Question
Question: In Young's double slit experiment, 12 fringes are observed by light of l = 600 nm in a certain segme...
In Young's double slit experiment, 12 fringes are observed by light of l = 600 nm in a certain segment of the screen. If wavelength is changed to 400 nm then number of fringes in the same segment will be –
A
12
B
18
C
24
D
30
Answer
18
Explanation
Solution
n1l1 = n2l2
12 × 600 = n2 × 400
n2 = 18