Question

A narrow beam of light from a laser travels through air (n = 1.00) and strikes...

A narrow beam of light from a laser travels through air

(n = 1.00)

and strikes point A on the surface of the water

(n = 1.33)

in a lake. The angle of incidence is 52°. The depth of the lake is 3.6 m. On the flat lake-bottom is point B, directly below point A.

(a) If refraction did not occur, how far away from point B would the laser beam strike the lake-bottom?
m

(b) Considering refraction, how far away from point B would the laser beam strike the lake-bottom?
m

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