A mirror lies flat on a table. A beam of light strikes the mirror with an angle of incidence or 15°, the reflected ray being to the right of the incident beam. The right edge of the mirror is then lifted so that the mirror now makes a 5° angle with the horizontal. What is the resulting angle between the incident beam and the reflected beam?
a. 25°
c. 35°
b. 20°
d. The angle is not given.
B
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