The diagram below shows light incident at an angle of 30° at a transparent rectangular slab made of medium B with refractive index nB = 2.0. Medium B is surrounded on all sides by medium A with refractive index na = 1.0. The thickness of the transparent slab is 60 cm. (a) Draw a neatly labeled diagram to show the path light takes as it passes through the slab and emerges on the other side. (b) How long does it take for light to cross the slab and emerge on the other side? Please express your final answer in units of nanoseconds using only two significant figures. (c) If the refractive index of medium A were increased to 1.5 and the experiment repeated, would the time taken by the wave to cross the slab increase, decrease or remain the same? Please explain with- out doing a calculation. Incident ray medium B normal medium A 60 ст

The diagram below shows light incident at an angle of 30° at a transparent rectangular slab made of medium B with refractive index nB = 2.0. Medium B is surrounded on all sides by medium A with refractive index na = 1.0. The thickness of the transparent slab is 60 cm. (a) Draw a neatly labeled diagram to show the path light takes as it passes through the slab and emerges on the other side. (b) How long does it take for light to cross the slab and emerge on the other side? Please express your final answer in units of nanoseconds using only two significant figures. (c) If the refractive index of medium A were increased to 1.5 and the experiment repeated, would the time taken by the wave to cross the slab increase, decrease or remain the same? Please explain with- out doing a calculation. Incident ray medium B normal medium A 60 ст