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Date Posted: 7/24/2008 8:44:43 AM  Status: Closed
physics help #2 will rate lifesaver for correct answer to part A!
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Question Details:
The two mirrors in Figure P22.6 meet at a right angle. The beam of light in the vertical plane P strikes mirror 1 at θ = 47.0° as shown.


Figure P22.6

(a) Determine the distance the reflected light beam travels before striking mirror 2.
wrong check mark
Your answer differs from the correct answer by 10% to 100%. m
(b) In what direction does the light beam travel after being reflected from mirror 2?
correct check mark° (above the horizontal)
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Date Posted: 7/24/2008 9:58:13 AM  Status: Live
Asker's Rating: Lifesaver   
Response:
A lightwave will reflect off at the same angle with respect to the normal (the vertical line). This means that in the picture above, the beam will reflect at 47degrees. This will create a right triangle with mirror 2. Using sin = opposite/hypotenuse, we have sin 47 = 1.25/x so .
 
B) with respect to the horizontal: The right triangle will have an angle normal to mirror 2 (horizontal) with the measure 90-47 = 43.



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