Question

If $v_s$ , $v_x$ and $v_m$ are the velocities of soft gamma rays, X-rays and Microwaves respectively in vacuum, then

• A. $v_s<v_x<v_m$
  
• B. $v_s=v_x=v_m$
• C. $v_s>v_x>v_m$
• D. $v_x<v_s<v_m$

Answer 1

The correct option is B $v_s=v_x=v_m$

Soft gamma rays, $x-$rays and microwaves are namely eletromagnetic having different wavelengths.

But, all of them propagate through space with the same speed,

$e=3\times {10}^{8}m/s$

so,

$v_s=v_x=v_m$