Question

An event on a distant star causes the emission of a burst of radiation containing b-particles,g-rays and light. Which one of the following statements about the order in which these radiations arrive at, the Earth is correct-

• A. The light would arrive first
• B. Theg-rays would arrive first
• C. The light and the g-rays would arrive together, ahead of the b-particles
• D. The light and theb-particles would arrive together ahead of the g-rays

Answer 1

Answer: (C)

The light and the g-rays would arrive together, ahead of the b-particles

Answer 2

Speed of light & g-rays is c while v_b< c