Question

A beam of yellow monochromatic light passes from liquid water (n=1.333) into ice (n=1.309). In the liquid water, the beam makes an angle of 40.0 with the normal. When the beam is traveling in the ice, what angle does it form with the normal?

40.7
39.3
41.2
68.5

Answer 1

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Answer 2

40.7

Step-by-step explanation:

na*sin(theta a)=nb*sin(theta b)

1.333*sin(40)=1.309*sin(theta b)

0.857/1.309=sin(theta b)

0.65=sin (theta b)

sin^-1 (0.65)=40.7