Question

Choose the correct relation for the speed of gamma rays $V_{g}$ , the speed of X-rays $V_{x}$ and the speed of microwaves $V_{m}$ in free space:

• A. $V_{g}>V_{x}>V_{m}$
• B. $V_{g}=V_{x}=V_{m}$
• C. $V_{g} < V_{x} < V_{m}$
• D. $V_{g}>V_{x} < V_{m}$

Answer 1

Answer: (B)

The speed of electromagnetic waves remain the same in a medium irrespective of their wavelength. All electromagnetic waves travel with the speed of light in vacuum.
$\therefore V_{g}=V_{x}=V_{m}$