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9. The refractive index of glass is 3/2 and that of water is 4/3. If the speed of light inwater is 2.25 x10m/s, then determine the speed of light in glass. |
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Answer» Answer: hiiii plz make me as BRAINLIST answer plz........ Explanation: 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 water
= (4/3) 3×10 8
=2.26×10 8 m/s |
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