Special theory of relativity > The slowing down of time and the reduction in the size of bodies in motion; the Lorentz Transformations > Problem 14.2.4

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Statement

Protons are accelerated by a voltage of 30 kV, and then, passing through a
gas target, they partially transform (practically without braking), capturing
electrons, into fast neutral hydrogen atoms. The frequency of stationary hydrogen atoms is . How much will the frequency of electromagnetic
waves emitted by moving hydrogen atoms perpendicular to the direction of
their movement change?

Solution

For problem $14.2.4$
For problem

Answer

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Contributed by @smb_2_3 · Last updated Aug 16, 2026
Cite this smb_2_3 (2026). Problem 14.2.4, O.Y. Savchenko, Problems in Physics. Savchenko Solutions. https://savchenkosolutions.com/en/14.2.4
Free to reuse under CC BY-SA 4.0 — with attribution.
Last edited smb_2_3 , Aug 16, 2026
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