We point out three errors present in the circuit diagram in figure 1, as well as a further
typographical error. The corrections to these errors do not have any impact on the overall
conclusions of the paper.
Corrigendum: Time-of-light measurement of the speed of sound in water (2016 Phys. Educ . 51 034001)
We point out three errors present in the circuit diagram in figure 1, as well as two typographical
errors. The corrections to these errors do not have any impact on the overall conclusions of the
paper.
Corrigendum: Time-of-light measurement of the speed of sound in a metal bar (2016 Phys. Educ . 51 034003 [http://https://doi.org/10.1088/0031-9120/51/3/034003] )
We point out three errors present in the circuit diagram in figure 1, as well as a further
typographical error. The corrections to these errors do not have any impact on the overall
conclusions of the paper.
XLVII Eesti füüsikapäevad ja XXXIX füüsikaõpetajate päevad
2017. aasta füüsikapäevad ja füüsikaõpetajate päevad toimuvad 24.-25. märtsil Tartus, TÜ Füüsikumis. Reede, 24.märts on teaduse päev, 25.märts on füüsikaõpetajate päev. Füüsikapäevade kava. Registreerumine.
Cassini Sees Heat Below the Icy Surface of Enceladus
A new study from NASA’s Cassini mission shows that Saturn’s moon Enceladus is warmer than expected just a few feet below its icy surface.
Cassini Sees Heat Below the Icy Surface of Enceladus
A new study from NASA’s Cassini mission shows that Saturn’s moon Enceladus is warmer than expected just a few feet below its icy surface.
Stereo vision
Space Science Image of the Week: Marking the ExoMars Trace Gas Orbiter’s first year in space with a new stereo image of Mars
No obstacles for airports using satellites
Thanks to ESA, airports can now use satellites to identify and manage obstacles that could pose a risk to flight safety.
Relativistic Electron Vortices
Author(s): Stephen M. BarnettTwo studies explore the properties of vortices formed by electrons that travel at relativistic speeds.[Phys. Rev. Lett. 118, 114802] Published Mon Mar 13, 2017
Relativistic Electron Wave Packets Carrying Angular Momentum
Author(s): Iwo Bialynicki-Birula and Zofia Bialynicka-BirulaTwo studies explore the properties of vortices formed by electrons that travel at relativistic speeds.[Phys. Rev. Lett. 118, 114801] Published Mon Mar 13, 2017
Relativistic Electron Vortices
Author(s): Stephen M. BarnettTwo studies explore the properties of vortices formed by electrons that travel at relativistic speeds.[Phys. Rev. Lett. 118, 114802] Published Mon Mar 13, 2017
Relativistic Electron Wave Packets Carrying Angular Momentum
Author(s): Iwo Bialynicki-Birula and Zofia Bialynicka-BirulaTwo studies explore the properties of vortices formed by electrons that travel at relativistic speeds.[Phys. Rev. Lett. 118, 114801] Published Mon Mar 13, 2017
NASA Studying Shared Venus Science Objectives with Russian Space Research Institute
NASA-sponsored scientists will meet with the Russian Academy of Sciences’ Space Research Institute (IKI) next week to continue work on a Joint Science Definition Team study focused on identifying shared science objectives for Venus explo…
NASA Studying Shared Venus Science Objectives with Russian Space Research Institute
NASA-sponsored scientists will meet with the Russian Academy of Sciences’ Space Research Institute (IKI) next week to continue work on a Joint Science Definition Team study focused on identifying shared science objectives for Venus explo…
Ancient Stardust Sheds Light on the First Stars
Astronomers have detected a huge mass of glowing stardust in a galaxy seen when the universe was only 4 percent of its present age.
Ancient Stardust Sheds Light on the First Stars
Astronomers have detected a huge mass of glowing stardust in a galaxy seen when the universe was only 4 percent of its present age.
Terahertz-Field-Induced Large Macroscopic Polarization and Domain-Wall Dynamics in an Organic Molecular Dielectric
Author(s): T. Morimoto, T. Miyamoto, H. Yamakawa, T. Terashige, T. Ono, N. Kida, and H. OkamotoAn organic crystal was switched between paraelectric and ferroelectric states in a picosecond. Similar materials could eventually serve as extremely fast dig…
Terahertz-Field-Induced Large Macroscopic Polarization and Domain-Wall Dynamics in an Organic Molecular Dielectric
Author(s): T. Morimoto, T. Miyamoto, H. Yamakawa, T. Terashige, T. Ono, N. Kida, and H. OkamotoAn organic crystal was switched between paraelectric and ferroelectric states in a picosecond. Similar materials could eventually serve as extremely fast dig…
Week In Images
Our week through the lens: 6 – 10 March 2017
Week In Images
Our week through the lens: 6 – 10 March 2017
Plans for the first spaceport are close to finalization
By the 2020s, NASA and other ISS partners are planning to begin construction on an orbiting lunar outpost.
How diverse are physics instructors’ attitudes and approaches to teaching undergraduate level quantum mechanics?
Understanding instructors’ attitudes and approaches to teaching undergraduate-level quantum
mechanics can be helpful in developing effective instructional tools to help students learn quantum
mechanics. Here we discuss the findings from a survey in…
Adjustable pipes and adaptive passive damping
Pipe natural frequencies are dependent on the geometry of the pipe where the pipe length is the main
contributor in regulating the natural frequencies. The boundary conditions are another major
contributor because the acoustic waves in the pipe will …
Magnetic dipole in a nonuniform magnetic field
The magnetic moment of a permanent magnet is determined from forces acting on the magnet in
nonuniform magnetic fields produced by two coaxial current-carrying coils. Therefore, the
measurements are performed under well controllable and reproducible …
How diverse are physics instructors’ attitudes and approaches to teaching undergraduate level quantum mechanics?
Understanding instructors’ attitudes and approaches to teaching undergraduate-level quantum
mechanics can be helpful in developing effective instructional tools to help students learn quantum
mechanics. Here we discuss the findings from a survey in…
Adjustable pipes and adaptive passive damping
Pipe natural frequencies are dependent on the geometry of the pipe where the pipe length is the main
contributor in regulating the natural frequencies. The boundary conditions are another major
contributor because the acoustic waves in the pipe will …
Magnetic dipole in a nonuniform magnetic field
The magnetic moment of a permanent magnet is determined from forces acting on the magnet in
nonuniform magnetic fields produced by two coaxial current-carrying coils. Therefore, the
measurements are performed under well controllable and reproducible …
NASA Mission Named ‘Europa Clipper’
NASA’s upcoming mission to investigate the habitability of Jupiter’s icy moon Europa now has a formal name: Europa Clipper.
NASA Mars Orbiter Tracks Back-to-Back Regional Storms
A regional dust storm currently swelling on Mars follows unusually closely on one that blossomed less than two weeks earlier and is now dissipating, as seen in daily global weather monitoring by NASA’s Mars Reconnaissance Orbiter.
…
NASA Mission Named ‘Europa Clipper’
NASA’s upcoming mission to investigate the habitability of Jupiter’s icy moon Europa now has a formal name: Europa Clipper.
NASA Mars Orbiter Tracks Back-to-Back Regional Storms
A regional dust storm currently swelling on Mars follows unusually closely on one that blossomed less than two weeks earlier and is now dissipating, as seen in daily global weather monitoring by NASA’s Mars Reconnaissance Orbiter.
…
Cassini Reveals Strange Shape of Saturn’s Moon Pan
These raw, unprocessed images of Saturn’s tiny moon, Pan, were taken on March 7, 2017, by NASA’s Cassini spacecraft.
Cassini Reveals Strange Shape of Saturn’s Moon Pan
These raw, unprocessed images of Saturn’s tiny moon, Pan, were taken on March 7, 2017, by NASA’s Cassini spacecraft.
New NASA Radar Technique Finds Lost Lunar Spacecraft
A new technological application of interplanetary radar pioneered by JPL scientists has successfully located spacecraft orbiting the moon — one active, and one dormant.
Orbiting in sunshine
Following three days of intensive work, mission control today declared the newly launched Sentinel-2B satellite fit and ready for commissioning.
Orbiting in sunshine
Following three days of intensive work, mission control today declared the newly launched Sentinel-2B satellite fit and ready for commissioning.
Earth from Space
Join us Friday, 10 March, at 10:00 CET for the ‘Earth from Space’ video programme. This week features a Sentinel-3 image over the Kamchatka Peninsula in Russia
Hubble solves the mystery bulge at the center of the Milky Way
Our supermassive black hole has been on a diet for millions of years… but when did it last splurge?
#Sentinel2Go at ESA
One hundred invited social-media users from almost 30 countries took part in the #Sentinel2Go launch event in Darmstadt this week
#Sentinel2Go at ESA
One hundred invited social-media users from almost 30 countries took part in the #Sentinel2Go launch event in Darmstadt this week
Operations manager
Operations image of the week: Spacecraft operations manager Michelle Collins during the launch of Sentinel-2B
Manipulating particles with light: radiation and gradient forces
The manipulation of matter with electromagnetic radiation is a capacity that has been known for over
a century. However, the prominence of such optical effects only grew rapidly following the invention
of optical tweezers in the 1980s. While both the…
The experiment editor: supporting inquiry-based learning with virtual labs
Inquiry-based learning is a pedagogical approach where students are motivated to pose their own
questions when facing problems or scenarios. In physics learning, students are turned into
scientists who carry out experiments, collect and analyze data,…
Comment on ‘On the realisation of quantum Fisher information’
It is shown that calculation of the momentum Fisher information of the quasi-one-dimensional
hydrogen atom recently presented by Saha et al (2017 Eur. J. Phys. 38
[http://https://doi.org/10.1088/1361-6404/aa51a0] 025103 ) is wrong. A correct derivati…
Manipulating particles with light: radiation and gradient forces
The manipulation of matter with electromagnetic radiation is a capacity that has been known for over
a century. However, the prominence of such optical effects only grew rapidly following the invention
of optical tweezers in the 1980s. While both the…
The experiment editor: supporting inquiry-based learning with virtual labs
Inquiry-based learning is a pedagogical approach where students are motivated to pose their own
questions when facing problems or scenarios. In physics learning, students are turned into
scientists who carry out experiments, collect and analyze data,…
Comment on ‘On the realisation of quantum Fisher information’
It is shown that calculation of the momentum Fisher information of the quasi-one-dimensional
hydrogen atom recently presented by Saha et al (2017 Eur. J. Phys. 38
[http://https://doi.org/10.1088/1361-6404/aa51a0] 025103 ) is wrong. A correct derivati…
Dawn Identifies Age of Ceres’ Brightest Area
The bright central area of Ceres’ Occator Crater, known as Cerealia Facula, is approximately 30 million years younger than the crater in which it lies, according to a new study in the Astronomical Journal.
NASA’s Kepler Provides Another Peek at Ultra-cool Neighbor
Data from NASA’s Kepler spacecraft about TRAPPIST-1, a system of seven Earth-size planets, are now available to the scientific community.
NASA Virtual Tour Highlights Women in STEM
For International Women’s Day and Women’s History Month, a new NASA educational virtual tour features seven women in science, technology, engineering and math (STEM) fields.
NASA Virtual Tour Highlights Women in STEM
For International Women’s Day and Women’s History Month, a new NASA educational virtual tour features seven women in science, technology, engineering and math (STEM) fields.
Dawn Identifies Age of Ceres’ Brightest Area
The bright central area of Ceres’ Occator Crater, known as Cerealia Facula, is approximately 30 million years younger than the crater in which it lies, according to a new study in the Astronomical Journal.
NASA’s Kepler Provides Another Peek at Ultra-cool Neighbor
Data from NASA’s Kepler spacecraft about TRAPPIST-1, a system of seven Earth-size planets, are now available to the scientific community.
Cross Interaction Drives Stratification in Drying Film of Binary Colloidal Mixtures
Author(s): Jiajia Zhou, Ying Jiang, and Masao DoiA simple diffusion model explains why small particles tend to push big ones to the bottom of a drying colloid film.[Phys. Rev. Lett. 118, 108002] Published Wed Mar 08, 2017
Electronic Stopping of Slow Protons in Transition and Rare Earth Metals: Breakdown of the Free Electron Gas Concept
Author(s): D. Roth, B. Bruckner, M. V. Moro, S. Gruber, D. Goebl, J. I. Juaristi, M. Alducin, R. Steinberger, J. Duchoslav, D. Primetzhofer, and P. Bauer
Measurements of how slow protons stop in tantalum and gadolinium show that the process is dependent on the density of states.
[Phys. Rev. Lett. 118, 103401] Published Wed Mar 08, 2017
Single Photon Thermal Ionization of C_{60}
Author(s): Klavs Hansen, Robert Richter, Michele Alagia, Stefano Stranges, Luca Schio, Peter Salén, Vasyl Yatsyna, Raimund Feifel, and Vitali Zhaunerchyk
A single high-energy photon ionizes a C60 molecule, promoting it to a highly excited state.
[Phys. Rev. Lett. 118, 103001] Published Wed Mar 08, 2017
Cross Interaction Drives Stratification in Drying Film of Binary Colloidal Mixtures
Author(s): Jiajia Zhou, Ying Jiang, and Masao DoiA simple diffusion model explains why small particles tend to push big ones to the bottom of a drying colloid film.[Phys. Rev. Lett. 118, 108002] Published Wed Mar 08, 2017
Electronic Stopping of Slow Protons in Transition and Rare Earth Metals: Breakdown of the Free Electron Gas Concept
Author(s): D. Roth, B. Bruckner, M. V. Moro, S. Gruber, D. Goebl, J. I. Juaristi, M. Alducin, R. Steinberger, J. Duchoslav, D. Primetzhofer, and P. Bauer
Measurements of how slow protons stop in tantalum and gadolinium show that the process is dependent on the density of states.
[Phys. Rev. Lett. 118, 103401] Published Wed Mar 08, 2017
Single Photon Thermal Ionization of C_{60}
Author(s): Klavs Hansen, Robert Richter, Michele Alagia, Stefano Stranges, Luca Schio, Peter Salén, Vasyl Yatsyna, Raimund Feifel, and Vitali Zhaunerchyk
A single high-energy photon ionizes a C60 molecule, promoting it to a highly excited state.
[Phys. Rev. Lett. 118, 103001] Published Wed Mar 08, 2017
Managing a mission
Ahead of International Women’s Day, the ‘Earth from Space’ team caught up with Sentinel-2 mission manager Bianca Hoersch to talk about her role in the recently launched Sentinel-2B satellite
Managing a mission
Ahead of International Women’s Day, the ‘Earth from Space’ team caught up with Sentinel-2 mission manager Bianca Hoersch to talk about her role in the recently launched Sentinel-2B satellite
Kepler provides more information about TRAPPIST-1
The spacecraft gives us another look at our cool new neighbor.
Kepler provides more information about TRAPPIST-1
The spacecraft gives us another look at our cool new neighbor.
Trajectories to victory
Technology image of the week: dizzyingly complex orbits charted across space as part of a global contest for the world’s best aerospace engineers and mathematicians
Astronoomiaviktoriin Pulsar 2017
9. märtsil 2017 toimub taas veebipõhine astronoomiaviktoriin “Pulsar”! Astronoomiaviktoriin „Pulsar“ viiakse läbi 9. märtsil 2017 ajavahemikus kl 9:00 – 20:00 veebikeskkonnas http://õpik.füüsika.ee/. Viktoriinist saab osa võtta internetiühendusega arvuti, nutitelefoni või tahvelarvuti vahendusel. Viktoriiniküsimused on eesti ja vene keeles. Ülesannete lahendamiseks on aega 40 minutit. Astronoomiaviktoriinist oodakse osa võtma 5.-12. klasside õpilasi ja ka kõiki teisi, kes soovivad […]
Barcelona Big Picture
Human spaceflight and robotic exploration image of the week: multi-photo mosaic of Barcelona seen from the Space Station
de Sitter Space as a Resonance
Author(s): Jonathan Maltz and Leonard Susskindde Sitter space is shown to arise as resonance in transition amplitudes in quantum gravity.[Phys. Rev. Lett. 118, 101602] Published Tue Mar 07, 2017
de Sitter Space as a Resonance
Author(s): Jonathan Maltz and Leonard Susskindde Sitter space is shown to arise as resonance in transition amplitudes in quantum gravity.[Phys. Rev. Lett. 118, 101602] Published Tue Mar 07, 2017
The Europa mission just got a new name. You will definitely guess what it is.
The mission once tentatively called the Europa Clipper is now OFFICIALLY called the Europa Clipper.
Pulsars may be churning out small reserves of antimatter
Long purported as possible proof of dark matter, an observed excess of antimatter might actually be due to pulsars instead.
Revisit #Sentinel2Go
From ESA’s mission control in Germany, watch the replay of the #Sentinel2Go event to celebrate the launch of the second satellite for the Sentinel-2 ‘colour vision’ mission
Full launch coverage
Watch the replay of the full Sentinel-2B launch coverage from Europe’s Spaceport in French Guiana on 7 March
Revisit #Sentinel2Go
From ESA’s mission control in Germany, watch the replay of the #Sentinel2Go event to celebrate the launch of the second satellite for the Sentinel-2 ‘colour vision’ mission
Full launch coverage
Watch the replay of the full Sentinel-2B launch coverage from Europe’s Spaceport in French Guiana on 7 March
Second ‘colour vision’ satellite for Copernicus launched
The ESA-developed Sentinel-2B satellite was launched today, doubling the coverage of high-resolution optical imaging in the Sentinel-2 mission for the European Union Copernicus environmental monitoring system.
Second ‘colour vision’ satellite for Copernicus launched
The ESA-developed Sentinel-2B satellite was launched today, doubling the coverage of high-resolution optical imaging in the Sentinel-2 mission for the European Union Copernicus environmental monitoring system.
Liftoff replay
Watch the replay of the Sentinel-2B launch on a Vega rocket from Europe’s Spaceport in French Guiana
Liftoff replay
Watch the replay of the Sentinel-2B launch on a Vega rocket from Europe’s Spaceport in French Guiana
Interstellar journeys in human lifetimes: numerical computations
Contrary to some contemporary accounts, a spacecraft with low acceleration can reach speeds very
close to the speed of light in just a few years. In support of the teaching of special relativity,
an easy to use software application has been created w…
Interstellar journeys in human lifetimes: numerical computations
Contrary to some contemporary accounts, a spacecraft with low acceleration can reach speeds very
close to the speed of light in just a few years. In support of the teaching of special relativity,
an easy to use software application has been created w…
NASA Wants to Create the Coolest Spot in the Universe
JPL’s Cold Atom Laboratory will let scientists study bizarre physics in space.
NASA Wants to Create the Coolest Spot in the Universe
JPL’s Cold Atom Laboratory will let scientists study bizarre physics in space.
Glue Spin and Helicity in the Proton from Lattice QCD
Author(s): Yi-Bo Yang, Raza Sabbir Sufian, Andrei Alexandru, Terrence Draper, Michael J. Glatzmaier, Keh-Fei Liu, and Yong Zhao (χQCD Collaboration)
Computer simulations indicate that about 50% of the proton’s spin comes from the spin of the gluons that bind its quark constituents.
[Phys. Rev. Lett. 118, 102001] Published Mon Mar 06, 2017
Glue Spin and Helicity in the Proton from Lattice QCD
Author(s): Yi-Bo Yang, Raza Sabbir Sufian, Andrei Alexandru, Terrence Draper, Michael J. Glatzmaier, Keh-Fei Liu, and Yong Zhao (χQCD Collaboration)
Computer simulations indicate that about 50% of the proton’s spin comes from the spin of the gluons that bind its quark constituents.
[Phys. Rev. Lett. 118, 102001] Published Mon Mar 06, 2017
Glue Spin and Helicity in the Proton from Lattice QCD
Author(s): Yi-Bo Yang, Raza Sabbir Sufian, Andrei Alexandru, Terrence Draper, Michael J. Glatzmaier, Keh-Fei Liu, and Yong Zhao (χQCD Collaboration)
Computer simulations indicate that about 50% of the proton’s spin comes from the spin of the gluons that bind its quark constituents.
[Phys. Rev. Lett. 118, 102001] Published Mon Mar 06, 2017
A tiny little asteroid came incredibly close to Earth last week
It won’t visit again for a very long time.
Meet the first African-American crew member of the ISS
Jeanette Epps will launch into history next year.
Planetary scientists are turning up volcanoes everywhere they look
… including comets.
Sentinel’s last stop
The Sentinel-2A satellite shows us where its twin, Sentinel-2B, will be launched from tonight – its last stop before space
Give me wings
Space Science Image of the Week: BepiColombo’s Mercury Planetary Orbiter opens its solar wing
Dressed to thrill
Mission teams on two continents completed a pre-launch ‘dress rehearsal’ yesterday, ensuring everything is ready for Sentinel-2B liftoff next week.
Dressed to thrill
Mission teams on two continents completed a pre-launch ‘dress rehearsal’ yesterday, ensuring everything is ready for Sentinel-2B liftoff next week.
Switching the Structural Force in Ionic Liquid-Solvent Mixtures by Varying Composition
Author(s): Alexander M. Smith, Alpha A. Lee, and Susan PerkinThe oscillating force between two plates immersed in a fluid can be tuned by adjusting the composition of the liquid.[Phys. Rev. Lett. 118, 096002] Published Fri Mar 03, 2017
Condensation on Highly Superheated Surfaces: Unstable Thin Films in a Wickless Heat Pipe
Author(s): Akshay Kundan, Thao T. T. Nguyen, Joel L. Plawsky, Peter C. Wayner, Jr., David F. Chao, and Ronald J. Sicker
Microgravity experiments on the space station show condensation on a surface that is well above the boiling point of the condensate.
[Phys. Rev. Lett. 118, 094501] Published Fri Mar 03, 2017
Optical Phase Conjugation with Less Than a Photon per Degree of Freedom
Author(s): M. Jang, C. Yang, and I. M. Vellekoop
When a beam of light is sent through a nearly opaque material, the scattered light that emerges can be unscrambled even with few photons detected.
[Phys. Rev. Lett. 118, 093902] Published Fri Mar 03, 2017
Condensation on Highly Superheated Surfaces: Unstable Thin Films in a Wickless Heat Pipe
Author(s): Akshay Kundan, Thao T. T. Nguyen, Joel L. Plawsky, Peter C. Wayner, Jr., David F. Chao, and Ronald J. Sicker
Microgravity experiments on the space station show condensation on a surface that is well above the boiling point of the condensate.
[Phys. Rev. Lett. 118, 094501] Published Fri Mar 03, 2017
Condensation on Highly Superheated Surfaces: Unstable Thin Films in a Wickless Heat Pipe
Author(s): Akshay Kundan, Thao T. T. Nguyen, Joel L. Plawsky, Peter C. Wayner, Jr., David F. Chao, and Ronald J. Sicker
Microgravity experiments on the space station show condensation on a surface that is well above the boiling point of the condensate.
[Phys. Rev. Lett. 118, 094501] Published Fri Mar 03, 2017
Optical Phase Conjugation with Less Than a Photon per Degree of Freedom
Author(s): M. Jang, C. Yang, and I. M. Vellekoop
When a beam of light is sent through a nearly opaque material, the scattered light that emerges can be unscrambled even with few photons detected.
[Phys. Rev. Lett. 118, 093902] Published Fri Mar 03, 2017
Switching the Structural Force in Ionic Liquid-Solvent Mixtures by Varying Composition
Author(s): Alexander M. Smith, Alpha A. Lee, and Susan PerkinThe oscillating force between two plates immersed in a fluid can be tuned by adjusting the composition of the liquid.[Phys. Rev. Lett. 118, 096002] Published Fri Mar 03, 2017
Watch Sentinel-2B launch
Follow the Sentinel-2B launch live from Europe’s Spaceport in French Guiana on 7 March. Streaming begins at 01:30 GMT (02:30 CET), with liftoff scheduled at 01:49 GMT (02:49 CET)