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9.
2y 2 y + x+y
Two plane mirrors are inclined at angle 'o'
as shown in figure. If a ray parallel to OB
strikes the other mirror at P and finally
emerges parallel to OA after two reflections
then 0 is equal to
o ZITTTTTTTTTTB
2) 60°3) 45° 4) 30°
1) 90°
10omis
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