Physics
Grade-10
Easy
Question
The refractive index of air is ____.
- 1
- 2
- 3
- 4
Hint:
The ratio of the speed of light as it travels through two mediums is known as the refractive index, sometimes known as the index of refraction. It is a dimensionless number that changes with temperature and light beam wavelength.
The correct answer is: 1
The refractive index of air is 1.
- The refractive index is the ratio of the speed of light in two different mediums i.e- medium 1 and medium 2.
- The air has no density as compared to a medium like glass or water.
- The refractive index of air or the refractive index of the atmosphere is approximately 1.002 which implies that the speed of light in air is 1.002 times slower than that in a vacuum.
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