A light ray travels in water ( )

PHYSICS · Single correct · A Level · Physics · Waves · Waves

Problem

A light ray travels in water (

n=1.33

), strikes a glass layer (

n=1.50

) at an angle of incidence

50^{\circ}

and then attempts to emerge into air on the far side. What happens at the glass–air boundary? (a) It emerges making an angle

65^{\circ}

with the normal. (b) It suffers total internal reflection inside the glass and does not emerge. (c) It emerges making an angle

27^{\circ}

with the normal. (d) It emerges with the same

50^{\circ}

angle as in water.