| ⇦ | 
| ⇨ |
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: - The frequency of an alternating voltage is 50 cycles per second and its amplitude
- The magnifying power of the astronomical telescope for normal adjustment is 50.
- A radioactive sample S₁ having an activity of 5 μCi has twice the number of nuclei
- An aeroplane is flying horizontally with a velocity of 216 km/h at a height of 1960 m.
- When two small bubbles join to form a bigger one, energy is
Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The frequency of an alternating voltage is 50 cycles per second and its amplitude
- The magnifying power of the astronomical telescope for normal adjustment is 50.
- A radioactive sample S₁ having an activity of 5 μCi has twice the number of nuclei
- An aeroplane is flying horizontally with a velocity of 216 km/h at a height of 1960 m.
- When two small bubbles join to form a bigger one, energy is
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