Question

In two similar interferce experiments, wavelengths of light used were in the ratio `4:5`, the sources ot screen distances were in the ratio `5:6` and the sources separation in the ration `2:3`. The ratio of their band width is
A. `1:1`
B. `1:2`
C. `2:1`
D. `1:4`

Answer 1

Correct Answer - A
`(beta_(1))/(beta_(2))=(D_(1))/(D_(2)).(lamda_(1))/(lamda_(2)).(d_(2))/(d_(1))`
`=(5)/(6)xx(4)/(5)xx(3)/(2)=(1)/(1)=1:1`