Question

2. This is a mostly-qualitative question about the meaning of the critical angle A. for water in contact with air. The questions below involve a beam of light traveling within the water toward the air-water interface. The incident beam is shown on a ray diagram in each part.

(a) In this part, the beam of light within the water makes an angle of incidence (within the water) of 30.0°, which is less than the critical angle for water in contact with air (48.8°).

(i) Is there a reflected beam within the water? Answer:

(ii) If there is a reflected beam within the water, what is the angle of reflection?

(iii) Is there a refracted beam within the air? Answer: -

(iv) If you answered “Yes” to (iii) just above, is the angle of refraction less than or greater than the angle of incidence? (Do not attempt to calculate the angle of refraction!)

Answer:

(v) Is this a case of total internal reflection? Answer:

(vi) Add rays to the diagram below, showing the reflected beam (if any), and the refracted beam (if any).

Answer 1

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