In young's experiment the interfering has amplitudes in the ratio 3:2, and then ratios of amplitudes between bright and dark fringes are:
5:1
9:4
7:1
49:1
As we learn
Resultant amplitude of two wave -
- wherein
amplitude of wave 1
amplitude of wave 2
phase difference
We have to obtain the ratio
and also coressponding ratio of intensities
but
By coresspond and divide
Hence ,
AND
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