Practise IB Physics SL C.3.1 by tracing wavefronts and rays through reflection, refraction, diffraction, mirrors, lenses and fibre optics.
A group of students is investigating refraction in a semi-circular glass block.
Light from a ray box enters the curved side of the block. The light passes through the block and leaves, refracted, at P .
Outline how the students can ensure that the light is not deflected at the curved surface.
measure P to be at the centre of the flat edge/side so that incident rays are aimed at P /go through radial lines
OR
check that the incident angle is 0∘ at every point of incidence
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