Question

the absolute refractive index of Glass and water are 4 by 3 and 32 respectively if the speed of light in glass is 2 into 10 raise to power 8 metre per second calculate the speed of light in vacuum and water.plz help. ​

Answer 1

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Answer 2

Answer:

ANSWER

Given : n

water

=

3

4

n

glass

=

2

3

v

glass

=2×10

8

m/s n

air

=1

Speed of light in a medium v

medium

=

n

c

where c and n are the speed of light in vacuum and refractive index of medium respectively.

(a) : v

glass

=

n

glass

c

∴ 2×10

8

=

(3/2)

c

⟹c=3×10

8

m/s

(b) : v

water

=

n

water

c

∴ v

w

water

=

(4/3)

3×10

8

=2.26×10

8 m/s

Explanation:

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