Question
Thu September 03, 2009 By:

the reduction in percentage is neede to be find!

Expert Reply
Thu September 03, 2009

Refractive index ot medium A w r t medium B = speed in medium B/speed in medium A

w r t = with respect to,

1.65 = speed in air/speed in flint glass

speed in flint glass = 3 x 108/1.65 = 1.82x108 m/s

Percentage change in speed = (speed in flint glass - speed in air)x100/speed in air

= (1.82x108 - 3 x 108)x100/3 x 108 = -39.33%

Percentage reduction in speed = 39.33%

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Sat September 23, 2017

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