Fig. 23-CO, p. 790

Fig. 23-1, p. 791

Fig. 23-2, p. 791

Fig. 23-3, p. 791

Fig. 23-4, p. 792

Fig. MCQ23-12, p. 817

Fig. P23-5, p. 818

Fig , p. 795

Fig. 23-9, p. 794

Fig a, p. 797

Fig , p. 797

Fig , p. 795

Fig b, p. 797

Fig c, p. 797

Fig , p. 798

Fig , p. 803

Atmospheric Refraction and Sun’s Position Light rays from the sun are bent as they pass into the atmosphere. It is a gradual bend because the light passes through layers of the atmosphere. –Each layer has a slightly different index of refraction. The Sun is seen to be above the horizon even after it has fallen below it. Section 23.5

Atmospheric Refraction and Mirages A mirage can be observed when the air above the ground is warmer than the air at higher elevations. The rays in path B are directed toward the ground and then bent by refraction. The observer sees both an upright and an inverted image. Section 23.5

Fig b, p. 804

Fig , p. 805 Lenses work by refracting light

Fig , p. 806

Fig , p. 807

Fig , p. 807

Fig a, p. 807

Fig b, p. 807

Fig c, p. 807

Fig , p. 809

Fig a, p. 809

Fig b, p. 809

Fig , p. 810

Fig a, p. 810

Fig b, p. 810

Fig , p. 814

p. 815

p. 816

Fig. P23-36, p. 820