28. Two plane mirrors OP and OQ are inclined at an acute angle (diagram is not to scale). A ray of light XY parallel to OQ strikes mirror OP at Y. The ray is reflected and hits mirror OQ, is reflected again and hits mirror OP and is reflected for a third time and strikes mirror OQ at right angles at R as shown. If OR = 5 cm, what is the distance d of the ray XY from the mir- ror OQ? (A) 4 cm (B) 4.5 cm (C) 5 cm (D) 5.5 cm (E) 6 cm O 5 R 0 X
28. Two plane mirrors OP and OQ are inclined at an acute angle (diagram is not to scale). A ray of light XY parallel to OQ strikes mirror OP at Y. The ray is reflected and hits mirror OQ, is reflected again and hits mirror OP and is reflected for a third time and strikes mirror OQ at right angles at R as shown. If OR = 5 cm, what is the distance d of the ray XY from the mir- ror OQ? (A) 4 cm (B) 4.5 cm (C) 5 cm (D) 5.5 cm (E) 6 cm O 5 R 0 X
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Transcribed Image Text:28. Two plane mirrors OP and OQ are inclined at an acute angle (diagram
is not to scale). A ray of light XY parallel to OQ strikes mirror OP at Y. The
ray is reflected and hits mirror OQ, is reflected again and hits mirror OP
and is reflected for a third time and strikes mirror OQ at right angles at R
as shown. If OR = 5 cm, what is the distance d of the ray XY from the mir-
ror OQ?
(A) 4 cm
(B) 4.5 cm
(C) 5 cm
(D) 5.5 cm
(E) 6 cm
O 5 R
2
X
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