Question
Mon December 05, 2011 By:

If the refractive index of a glass slab of thickness 3 mm is 1.5, then, the time taken by the sunlight to pass through it is ______ canya explain this with proper steps?

Expert Reply
Mon December 05, 2011
refractive index=speed of lt in vacuum/speed of light in that med
                  1.5=3×108 /v
                  v=2×108 m/s
                  d=3mm
    t=? d/v=1.5×10-11 sec
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