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CBSE Class 10 Answered

Light enters from air into water which has a refractive index of1.33.Calculate the speed of light in water.The speed of light in air is 3.0×10^8
Asked by sarahjaved711 | 10 Mar, 2021, 04:08: PM
answered-by-expert Expert Answer
when light is travelling obliquely from one medium to other medium, direction of propagation changes in second medium.
This phenomenan is refraction of light.
 
begin mathsize 12px style r e f r a c t i v e space i n d e x space space o f space m e d i u m equals space fraction numerator s p e e d space o f space l i g h t space i n space a i r over denominator s p e e d space o f space l i g h t space i n space m e d i u m end fraction end style
speed of light in water = ( 3×108 )/ 1.33  = 2.25×108 m/s
 
Answered by Shiwani Sawant | 12 Mar, 2021, 07:45: PM

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