Two slite in Young's experiment have widths in the ratio 81:1. What is the ratio of the amplitude of light waves coming from them??
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solution--
given - W1 / W2 = 81 / 1
to find-- ratio of amplitudes ( a1 / a2 )
formula - W1 / W2 = I 1 / I 2 = a1² / a2²
calculation-- from formula,
81 / 1 = a1² / a2²
therefore, a1 / a2 = 9 / 1
therefore, a1 : a2 = 9:1
the ratio of the amplitudes is 9 : 1
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