The velocity of photon is:
Correct answer: A. 3 x 10^8 ms-1
- A. 3 x 10^8 ms-1
- B. 3 x 10^8 cms-1
- C. 3 x 10^2 ms-1
- D. 6 x 10^8 ms-1
Explanation
The velocity of a photon in a vacuum is constant and is equal to the speed of light c, which is approximately 3 x 10-8 m/s. In a vacuum, all electromagnetic waves, including light, travel at this speed. This fundamental constant plays a crucial role in various areas of physics, and it represents the maximum speed at which information or energy can be transmitted through space.
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About Dawn of Modern Physics
Classical physics cannot explain blackbody radiation and related observations, leading to Planck’s quantum theory, in which energy is emitted or absorbed in discrete packets. Photons provide the particle model of light, with energy and momentum linked to frequency and wavelength, including the photoelectric effect and its threshold frequency.
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