In the modern physics unit included in the course curriculum of grade 10 physics introduced in the
2007–2008 education year, the aim is that students at this grade level are aware of any developments
which constitute modern physics and may be considered new, and interpret whether mass, length and
time values of the motions at any velocities close to the speed of light vary or not. One of the
scientific concepts and subjects among the final ones to be learned in the unit of modern physics
with 12 course hours includes the special relativity theorem and its results. The special relativity
theorem, the foundation of which was laid by Einstein in 1905, has three significant predictions
proven by experiments and observations: time extension, dimensional shortening and mass relativity.
At the first stage of this study, a simple and fast solution that uses the Pythagorean relation for
problems and must be treated by using the mathematical expressions of the predictions as specified
abo…