A diver in a swimming pool wants to signal hi | vedclass

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(C) When light travels from a denser medium (water) to a rarer medium (air),it bends away from the normal.If the angle of incidence is less than the c

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He has to direct the beam at an angle to the vertical which is slightly less than the critical angle of incidence for total internal reflection.

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(C) When light travels from a denser medium (water) to a rarer medium (air),it bends away from the normal.If the angle of incidence is less than the critical angle $(i If the angle of incidence is greater than the critical angle $(i > C)$,total internal reflection occurs,and the light remains in the water.To signal a person outside the pool,the diver must ensure the light refracts into the air,which happens when the angle of incidence is slightly less than the critical angle.

$A$ diver in a swimming pool wants to signal his distress to a person lying on the edge of the pool by flashing his waterproof flashlight. In which direction should he direct the beam?

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