Question
Download Solution PDFLight travels in vacuum or air, a distance of nearly __________ metres in one second.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe Correct answer is 299,792,458 m/s.
Key Points
- The speed of light in vacuum is approximately 299,792,458 metres per second (m/s).
- This constant is denoted by the symbol c in physics.
- The speed of light is fundamental in many areas of physics, particularly in the theory of relativity.
- Albert Einstein's theory of relativity relies on the speed of light as a constant, which helps in explaining the relationship between space and time.
- The speed of light is also crucial in calculating distances in astronomy, such as the distance light travels in a year, known as a light-year.
- In materials other than vacuum, such as air or glass, light travels at different speeds, but the vacuum speed remains a universal constant.
- This value is also used in the definition of the metre, which is the distance light travels in vacuum in 1/299,792,458 seconds.
Additional Information
- Understanding the speed of light has been essential in the development of technologies such as GPS, optical fibers, and high-speed communication systems.
- In quantum mechanics, the speed of light plays a key role in the equations that describe the behavior of particles at the quantum level.
Last updated on May 29, 2025
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