What is the value of the speed of gamma radiation in air or vacuum?
gamma rays (γ) are electromagnetic waves and electromagnetic waves travel with speed light in air or vacuum.
Hence, The speed of gamma rays (γ) in air or vacuum is 3x108ms-1.
How is the refractive index of a medium related to the speed of light in it and in vacuum or air?
What is the value of the speed of gamma radiations in air or vacuum?