Fig. 10.1 displays two mirrors set at right angles to one another. A ray of light falls on mirror A, and it is then reflected towards mirror B.
(a)[1]
Find the angle of incidence of the ray at mirror A.
(b(i))[2]
The ray is reflected again from mirror B. On Fig. 10.1, extend the ray’s path. Show where the reflected ray is and the normal to mirror B.
(b(ii))[1]
On Fig. 10.1, use the letter $r$ to show the angle of reflection from mirror B.
(c)[1]
State the law that you used to finish the ray diagram.
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