Speed of light in vacuum is a.highest attainable speed b.attainable by small mass particles in vacuum c.Attainable by dust particles in interstellar space d.None of the above?

Question

Answer

The correct answer is a) highest attainable speed.

The speed of light in a vacuum is the highest attainable speed for any physical object. It is a fundamental constant of nature, and is denoted by the symbol "c" in physics. The speed of light is approximately 299,792,458 meters per second (m/s) in a vacuum, and is the same for all electromagnetic waves, regardless of their frequency or wavelength.

Option b) attainable by small mass particles in vacuum is incorrect, as the speed of light is not dependent on the mass of the object. Option c) Attainable by dust particles in interstellar space is also incorrect, as the speed of light is independent of the location or the presence of other objects or materials. Option d) None of the above is also incorrect, as the speed of light in a vacuum is indeed one of the highest attainable speeds.

Answer

Speed of Light in Vacuum
Speed of light in vacuum is a. highest attainable speed.

Explanation:
- The speed of light in vacuum is approximately 299,792 kilometers per second (km/s).
- According to the theory of relativity proposed by Albert Einstein, the speed of light in vacuum is the highest attainable speed in the universe.
- No object with mass can exceed the speed of light in vacuum. As an object with mass approaches the speed of light, its energy and momentum increase towards infinity, making it impossible to reach or exceed the speed of light.
- Light itself, being massless, can travel at the speed of light in vacuum.
- This universal speed limit plays a crucial role in our understanding of the nature of space, time, and the universe.
Therefore, the correct answer is a. highest attainable speed.

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