time taken by the sunlight to pass through a window of thickness 4 mm is refractive index is 1.5 is assuming the sunlight falls perpendicular on the window
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Velocity in glass of light = velocity of light in air*refractive index
=200000000m/s
Distance =4mm=0.4cm=0.0004m
Times =distance /speed
=2*10 ^ - 12
=200000000m/s
Distance =4mm=0.4cm=0.0004m
Times =distance /speed
=2*10 ^ - 12
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