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Question #1: Two plane mirrors are place perpendicular to each other. A laser hits mirror M1
30cm above the origin (0,0) as shown in the figure below.
a) Find the distance from the origin where the laser will incident at mirror M2.
b) How long it will take the laser to travel (in nano-second) from mirror M2 to the
screen(situated 50 cm parallel to M1)?
M1
25°
Screen
300M
M2
(0,0)
is
5o cm

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