Yong's double-slit experiment is carried out by using green, red and blue light, one color at a time. The fringe widths recorded are `beta_(G),beta_(R)` and `beta_(B)`, respectively. Then

Options

A. `beta_(G) gt beta_(B) gt beta_(R )`
B. `beta_(B) gt beta_(G) gt beta_(R )`
C. `beta_(R ) gt beta_(B) gt beta_(G)`
D. `beta_(R )gt beta_(G) gt beta_(B)`

Answer

D

Explanation

We know that, fringe width, `beta=(lambdaD)/(d)`
`or beta prop lambda`
Now, `lambda_(R) lt lambda_(G) gt lambda_(B)`
`therefore beta_(R) gt beta_(G) gt beta_(B)`