In a biprism expeirment the interference pattern is obtained with two monochromatic sources of light. It is observed that `15^(th)` brigh band of one source coincides with `13^(th)` brigh band of other source with the same setting . The ratio of wavlenght of tow sources

Options

A. `1.86`
B. `0.86`
C. `2.86`
D. `0.46`

Answer

B

Explanation

`x_(15b)=x'_(13b)" "15lamda_(1)=13lamda_(2)`
`:.(lamda_(1))/(lamda_(2))=(13)/(15)=0.86`