(a)[3]
State and explain, in terms of wavefronts, the change that occurs to the light.
(b)[2]
Calculate the refractive index of the glass.
Physics 0625 · IGCSE · Light
Light — practice question
A beam of light moving through air hits a glass block at an angle of $30^{\circ}$ to the normal. On entering the glass block, the light decreases in speed.
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