2. Three rays of light enter a hemispherical block of glass at different angles
to strike at its centre.
(a) Draw the paths of rays A and C after striking the block at point O.
(6) Show the critical angle.
(c) What phenomenon does the ray C exhibit?
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State Snell's law of refraction and show with appropriate drawings how it ... Calculate the critical angle of incidence for the interface between two optical ... all of the optics he had in his “Geo” course back at school really prepared him well for his ... Figure 3-3 Typical light rays in (a) propagation, (b) reflection, and (c) refraction.
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