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

The refractive indices of flint glass for red and violet light are 1.613 and 1.632 respectively. Find the angular dispersion produced by a thin prism of flint glass having refracting angle of 5.

A
0.081
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
0.075
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
0.095
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
0.06
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is C 0.095
Given that,
Refractive index of glass for red light, μr=1.613
Refractive index of glass for violet light, μv=1.632
Angle of prism, A=5

Deviation for the red light is given by,
δr=(μr1)A
Deviation for the violet light is,
δv=(μv1)A

Thus, the angular dispersion produced is:
Δθ=δvδr
or, Δθ=(μv1)A(μr1)A
Δθ=(μvμr)A
Δθ=(1.6321.613)×5
Δθ=0.019×5=0.095
Why this question?
Tip: Angular dispersion is the angular region, which contains all the deviated light components after refraction from prism.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
Join BYJU'S Learning Program
CrossIcon