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  1. What is speed of light in vacuum? How does vacuum, force and air effects speed of light? View Solution. Q4. The speed of light, in a given medium is (2 / 3) r d of ...

  2. (2) The speed of light in water and glass is 2.2 × 10 8 m/s and 2 × 10 8 m/s, respectively. What is the refractive index of − (a) water w.r.t. glass (b) glass w.r.t. water. (3) Refractive index of water is 4/3 and speed of light in air is 3×10 8 m/s. Find speed of light in water.

  3. a new unit of lenght is selected in such a way that the speed of lght in vacuum is unity. calculate the distance between sun and earth in this new unite of time if light from sun takes 500 sec to reach the earth

  4. The speed of light in water is $$ 2.25 \times 10^8 $$ m/s . If the speed of light in a vacuum be $$ 3 \times 10^8 $$ m/s, calculate the refractive index of water.

  5. The speed of light in vacuum is a universal constant independent of all the factors listed and anything else. In particular, note the surprising fact that it is independent of the relative motion between the source and the observer. This fact is a basic axiom of Einsteins special theory of relativity.

  6. State the law of refraction of light.Write an expression to relate absolute refractive index of a medium wit speed of light in vacuum. The refractive index of medium x with respect to y is 2 3 and the refractive index of medium y with respect to z is 4 3. Calculate the refractive index of medium z with respect to x

  7. The speed of light in vaccum, flint glass and crown glass is 3.00 × 10 8 m / s, 1.86 × 10 8 m / s a n d 1.97 × 10 8 respectively. What is the relative refractive index for light going from crown glass to flint glass?

  8. The speed of light in medium b is c 3, where c = speed of light in vacuum and light refracts from medium a to medium b making angles 45 ∘ and 60 ∘ respectively with normal. The speed of light in medium a is

  9. Answer – The speed of light in a vacuum is 299,792,458 meters per second. This is equal to 186,282 miles per second. Explanation: The speed of light in vacuum is a universal physical constant, which means that its value is constant across time and that it is also universally the same. Frequently, the speed of light in vacuum is denoted by the ...

  10. The ratio of the speed of the electron in the ground state of hydrogen atom to the speed of light in vacuum is $$1:137$$ Hence option C is correct. Was this answer helpful?

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