A ray passes through opposite parallel faces of a rectangular glass block surrounded by air. Its angle of incidence at the first face is 45∘ 45^\circ\,45∘ and its angle of refraction is 28∘28^\circ28∘.
Which pair gives the angle of incidence at the second face and the angle of emergence into air?
Second face 45∘45^\circ45∘; emergence 28∘28^\circ28∘.
Second face 62∘62^\circ62∘; emergence 45∘45^\circ45∘.
Second face 28∘28^\circ28∘; emergence 28∘28^\circ28∘.
Second face 28∘28^\circ28∘; emergence 45∘45^\circ45∘.
84 exam-style questions on Edexcel GCSE Physics 5.2 The electromagnetic spectrum, covering 5.2.1 Electromagnetic waves and refraction in glass (core practical), 5.2.2 Groups of the electromagnetic spectrum, 5.2.3 Wavelength-dependent behaviour of EM waves, and 5.2.4 Velocities of EM waves in different substances. Each one has a worked solution and a mark scheme showing where the marks go.