The speed of light in air and water are 3*10^8 m/s and 2.25 * 10^8m/s . Respectively refractive index of water is 4/3 . Then find the velocity of light in vacuum ?
Answers
Step-by-step explanation:
Question
The speed of light in air and water are 3*10^8 m/s and 2.25 * 10^8m/s . Respectively refractive index of water is 4/3 . Then find the velocity of light in vacuum ?
Solution
Given:-
Speed of light in air = 3 × 10^8 m/s.
Speed of light in water = 2.25 × 10^8 m/s.
Refractive index of water = 4/3
Find:-
Speed of light in vacuum .
Explanation
Important Formula
★ Speed of light in vacuum = Speed of light in water × Refractive index of water.
So,
==> Speed of light in vacuum = 2.25 × 10^8 * 4/3
==> Speed of light in vacuum = 0.75 × 4 × 10^8
==> Speed of light in vacuum = 3 × 10^8 .m/s
Thus
Speed of light in vacuum = 3 × 10^8 m/s.
_________________
Answer:
Prabhaagnihotri
Prabhaagnihotri
13.05.2020
Physics
Secondary School
+5 pts
Answered
The speed of light in air and water are 3*10^8 m/s and 2.25 * 10^8m/s . Respectovely refrective index of water is 4/3 . Then find the velocity of light in vaccum
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Question
The speed of light in air and water are 3*10^8 m/s and 2.25 * 10^8m/s . Respectively refractive index of water is 4/3 . Then find the velocity of light in vacuum ?
Solution
Given:-
Speed of light in air = 3 × 10^8 m/s.
Speed of light in water = 2.25 × 10^8 m/s.
Refractive index of water = 4/3
Find:-
Speed of light in vacuum .
Explanation
Important Formula
★ Speed of light in vacuum = Speed of light in water × Refractive index of water.
So,
==> Speed of light in vacuum = 2.25 × 10^8 * 4/3
==> Speed of light in vacuum = 0.75 × 4 × 10^8
==> Speed of light in vacuum = 3 × 10^8 .m/s
Thus
Speed of light in vacuum = 3 × 10^8 m/s.
_________________