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A thin prism of angle 15⁰ made of glass of refractive index µ₁ = 1.5 is combined with another prism of glass of refractive index µ₂ = 1.75. The combination of the prism produces dispersion without deviation. The angle of the second prism should be
Options
(a) 7⁰
(b) 10⁰
(c) 12⁰
(d) 5⁰
Correct Answer:
10⁰
Explanation:
Deviation= 0, so ? = ?￢ﾂﾁ + ?￢ﾂﾂ = 0
(µ₁ – 1)A₁ + (µ₂ – 1)A₂ = 0
A₂(1.75 – 1) = – (1.5 – 1) 15⁰
A₂ = – 0.5 / 0.75 x 15⁰
or A₂ = – 10⁰
Negative sign shows that the second prism is inverted with respect to the first.
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Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A train of mass 2x 10⁵ kg has a constant speed of 20 m/s up a hill inclined
- The ratio of radii of planets A and B is K₁ and ratio of accelerations
- The kinetic energy needed to project a body of mass m from the surface of earth
- A 1 kg particle strikes a wall with velocity 1 m/s at an angle 30° and reflects
- An explosion breaks a rock into three parts in a horizontal plane
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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