The refracting angle of a prism is A and refractive index of the material of the prism

The Refracting Angle Of A Prism Is A And Refractive Physics Question

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:

  1. When three identical bulbs of 60 W-200 V rating are connected in series to a 200 V
  2. If the sodium light in Young’s double slit experiment is replaced by red light
  3. A heavy uniform chain lies on a horizontal top table.If the coefficient of friction
  4. A nucleus ᵐₙ X emits one α- particle and two β- particles. The resulting nucleus is
  5. If seperation between screen and source is increased by 2%. What would be the effect

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.

NEETLab Mobile App

Share this page with your friends

Be the first to comment

Leave a Reply

Your email address will not be published.


*