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CBSE Class 10 Answered

PLEASE CLARIFY ...........
Asked by mesourav | 25 Jul, 2009, 05:56: PM
answered-by-expert Expert Answer

 

Refractive index n = speed of light in vacuum (c) / speed of light in medium (v)

and  v = distance (s)  / time (t)

Given: n = 1.5; s = 340 mm = 0.34 m; c = 3 x 108 m/s; t = ?

1.5 = 3 x 108 x t / 0.34 

t = 1.5 x 0.34 / 3 x 108 

t = 1.7 ns

 

Answered by | 27 Jul, 2009, 03:15: PM

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