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3.2.2 Refraction of light

A ray of light travels through a medium of refractive index $n_1\,$ towards a boundary with another medium of refractive index $n_2$ .

Which row correctly identifies the conditions required for total internal reflection to occur?

$n_1 < n_2$ and $θ\theta$ is less than the critical angle

$n_1 < n_2$ and $θ\theta$ is greater than the critical angle

$n_1 > n_2$ and $θ\theta$ is less than the critical angle

$n_1 > n_2$ and $θ\theta$ is greater than the critical angle

3.2.2 Refraction of light Questions

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.

A ray of light travels through a medium of refractive index $n_1\,$ towards a boundary with another medium of refractive index $n_2$ .

Which row correctly identifies the conditions required for total internal reflection to occur?

$n_1 < n_2$ and $θ\theta$ is less than the critical angle

$n_1 < n_2$ and $θ\theta$ is greater than the critical angle

$n_1 > n_2$ and $θ\theta$ is less than the critical angle

$n_1 > n_2$ and $θ\theta$ is greater than the critical angle

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.