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3.2.2 Refraction of light

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Question 33

A ray of light travels through a medium of refractive index n1 n_1\,n1​ towards a boundary with a second medium of refractive index n2n_2n2​. Under what conditions will the ray undergo total internal reflection at the boundary, where θc \theta_c\,θc​ represents the critical angle?

A

n1>n2n_1 > n_2n1​>n2​ and the angle of incidence is less than θc\theta_cθc​

B

n1<n2n_1 < n_2n1​<n2​ and the angle of incidence is greater than θc\theta_cθc​

C

n1>n2n_1 > n_2n1​>n2​ and the angle of incidence is greater than θc\theta_cθc​

D

n1<n2n_1 < n_2n1​<n2​ and the angle of incidence is less than θc\theta_cθc​

Markscheme

3.2.2 Refraction of light Questions

  1. IGCSE
  2. /Physics
  3. /3.2.2 Refraction of light

100 exam-style questions on CIE IGCSE Physics 3.2.2 Refraction of light. Each one has a worked solution and a mark scheme showing where the marks go.

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