A ray of light enters a rectangular glass block from air. The angle of incidence is 50∘ 50^\circ\,50∘ and the angle of refraction is 30∘30^\circ30∘.
The ray then leaves through the opposite parallel face of the block.
What is the angle between the emerging ray and the normal?
50∘50^\circ50∘
30∘30^\circ30∘
40∘40^\circ40∘
60∘60^\circ60∘
51 exam-style questions on OCR GCSE Physics 5.3 Wave interactions, covering 5.3.1 Wavelength and how substances affect waves, 5.3.2 Wave velocity in different substances, 5.3.3 Convex and concave lenses, 5.3.4 Ray diagrams for reflection and refraction, and 5.3.5 Colour, absorption and reflection. Each one has a worked solution and a mark scheme showing where the marks go.