Question

how does the speed of visible light compare with the speed of gamma rays, when both speeds are measured in a vacuum?
no answer can be determined from the information given.
the speed of gamma rays is greater.
the speeds are the same.
the speed of visible light is greater.

Explanation:

Visible light and gamma rays are both electromagnetic waves. In a vacuum, all electromagnetic waves travel at the same speed, which is the speed of light \(c = 3\times10^{8}\space m/s\). This is a fundamental property of electromagnetic radiation in a vacuum.

Answer:

The speeds are the same.