<prompt> Velocity of X-ray is:1 lakh milessec2 lakh milessec3 lakh milessec0.5 lakh milessec  <response>: X-rays are electromagnetic radiations with following properties:Velocity 3 x 108 msec or 2 lakh milessecThey cannot be focused, reflected or refracted.They cast the shadow of the objects falling in their path.They are affected by electric and magnetic field.Ref: Karjodkar 3rd Ed, Pg-72 