Previous year MCQs

General science UPPSC 2018 GS-I
Question

Which of the following has the highest velocity?

Answer & Solution

Answer: (Detailed Solution Below)

Option B: Light

Detailed Solution:

The correct answer is “Light”.
Light has the highest velocity. It travels at approximately 3 x 10^8 meters per second, which is the maximum speed attainable in the universe. Cosmic rays, while moving very fast, do not reach the speed of light.

Electrons can also move at very high speeds, but they are generally slower than light. Supersonic waves, which are sound waves traveling faster than the speed of sound, are still significantly slower than the speed of light.

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