Deviation by a Thin Prism Numerical Class-12 Nootan ISC Physics Ch-17 Refraction and Dispersion of Light through a Prism. Step by step solutions of Kumar and Mittal Physics of Nageen Prakashan as council latest prescribe guideline for upcoming exam. Visit official Website CISCE for detail information about ISC Board Class-12 Physics.
Deviation by a Thin Prism Numerical Class-12 Nootan ISC Physics Ch-17 Refraction and Dispersion of Light through a Prism
| Board | ISC |
| Class | 12 |
| Subject | Physics |
| Book | Nootan |
| Chapter-17 | Refraction and Dispersion of Light through a Prism |
| Topics | Numericals on Deviation by a Thin Prism |
| Academic Session | 2025-2026 |
Numericals on Deviation by a Thin Prism
Class-12 Nootan ISC Physics Ch-17 Refraction and Dispersion of Light through a Prism.
Que-14: A thin prism of refracting angle 10° produces a deviation of 5° in a ray of light passing through it. Find the refractive index of the prism material and the velocity of light in it.
Ans- δm – (μ-1)A {for thin prism}
=> 5° = (μ-1)10
=> (μ-1) = 0.5
=> μ = 1.5
∴ v = c/μ
=> 3 x 10^8 / 1.5
=> 2 x 10^8 m/s
Que-15: A ‘thin’ prism of glass placed in air produces a deviation of 4° in a light ray. If the prism be placed in water, what would be the new deviation?
Ans- δm – (μ-1)A
=> μ° = (1.5 – 1) A
=> A = 8°
again refractive index in water
=> 1.5 x 3/4
∴ δm = (4.5/4 -1) = 1°
–: End of Deviation by a Thin Prism Numerical Class-12 Nootan ISC Physics Ch-17 :–
Return to : – Nootan Solutions for ISC Class-12 Physics
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