light is incident at an angle of 30 and 45 on the same face of a given rectangular slab. if the angles of refraction at this face are r1and r2 in two cases. obtain the relation in these angles?
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sini/sinr=refractive index
both refractive index is equal so
sin30/r1=sin45/r2
r1/2=r2/√2
both refractive index is equal so
sin30/r1=sin45/r2
r1/2=r2/√2
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