| ⇦ | 
| ⇨ |
The refracting angle of a prism is A and refractive index of the material of the prism is cot (A/2). The angle of minimum deviation is
Options
(a) 180⁰-3 A
(b) 180⁰-2 A
(c) 90⁰- A
(d) 180⁰+2 A
Correct Answer:
180⁰-2 A
Explanation:
Refractive index, μ = sin (A+Dm / 2) / sin (A/2)
cot (A / 2) = sin (A+Dm / 2) / sin (A/2)
cos (A/2) / sin (A/2) = sin (A+Dm / 2) / sin (A/2)
sin [(π/2) – (A/2)] = sin [(A + Dm) / 2]
(π / 2) – (A / 2) = (A / 2) + (Dm / 2)
Dm = π – 2A
Angle of minimum deviation, Dm = 180° – 2A
Related Questions: - Calculate power output of ₉₂²³⁵U reactor, if it takes 30 days to use up 2 kg of fuel,
- The root mean square speed of oxygen molecule (O₂) at a certain temperature is v.
- A train is moving along a straight path with uniform acceleration
- 1 curie is equal to
- In the reaction ₁²H+₁³H+₂⁴He+₀¹n, if the binding energies of ₁²H,₁³H and ₂⁴He
Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Calculate power output of ₉₂²³⁵U reactor, if it takes 30 days to use up 2 kg of fuel,
- The root mean square speed of oxygen molecule (O₂) at a certain temperature is v.
- A train is moving along a straight path with uniform acceleration
- 1 curie is equal to
- In the reaction ₁²H+₁³H+₂⁴He+₀¹n, if the binding energies of ₁²H,₁³H and ₂⁴He
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply