The speed of light in air is 3 × 108 m s–1, whereas that of the speed of light in water is 2.26 × 108 m s–1. The refractive index of water with respect to air is :
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17
Answer:
relative ref. index of medium 1 with respect to medium 2 = ₁n₂ = c1/c2
ref index . =speed of light in air /speedof light in water
= 3×10⁸/2.26×10⁸
=1.33
Answered by
44
Solution :
Speed of light in air = 3 × 10^8 m s–1
Speed of light in water = 2.26 × 10^8 m s–1
Refractive index of water with respect to air
=> speed of air/speed of water
=> 3 × 10^8/2.26 × 10^8
=> 3/2.26
=> 1.32
- Hence, refractive index is 1.32
Information :
°•It's the ratio of speed of light in vaccum to the speed of light in medium.
→ n = c/v
where, c = speed of light in vaccum
v = speed of light in medium
°• It has no unit
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