7 An estimate of the refractive index of glass is 1.5. If the angle of incidence is
30o
30o
the angle of refraction is
19o
19o
60o
60o
35o
35o
70o
70o
8 The critical angle for total internal reflection at an air - water interface is approximately
48o
48o
. In which of the following situations will total internal reflection occur.
light incident in water at
40o
40o
light incident in water at
55o
55o
light incident in air at
40o
40o
light incident in air at
55o
55o
9 When refraction occurs which of the following remains unchanged?
wave number
wavelength
velocity
frequecy
1
Expert's answer
2016-08-22T04:41:45-0400
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