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OpenStudy (anonymous):
Please help!!! A source of laser light sends rays ab and ac towards two opposite waslls of a hall. The light strikes the walls at points b and c. What is the distance between the walls? 80m 140m 70m 110m
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OpenStudy (anonymous):
@peachpi
OpenStudy (danjs):
Light travels at a constant velocity, near 3 by 10^8 m/s. How much time did it take each ray to reach both walls?
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