wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Laser light of wavelength 630 nm incident on a pair of slits produces an interference pattern in which the bright fringes are separated by 8.1 mm. A second light produces an interference pattern in which the fringes are separated by 7.2 mm. Then the wavelength of the second light will be

A
500 nm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
560 nm
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
600 nm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
660 nm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B 560 nm
Fringe width β=nλDd

In the question, since the slits remain the same, D and d don't change.

Thus, β2β1=λ2λ1
7.2 mm8.1 mm=λ2630 nm
λ2=560 nm

flag
Suggest Corrections
thumbs-up
0
similar_icon
Similar questions
View More
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon