Physics

Problem

Light travels in air with speed

v_1=3.00\times10^{8}\,\text{m}\,\text{s}^{-1}

and in water with speed

v_2=2.25\times10^{8}\,\text{m}\,\text{s}^{-1}

. A plane wavefront is incident from air onto the water surface at an angle of

60^{\circ}

to the normal. Find the approximate angle of refraction in water. a)

45^{\circ}

36^{\circ}

41^{\circ}

22^{\circ}