Mathematics, 10.12.2020 08:40, bsonicx

The diagram shows rays of light from a point source, P, that reach a detector, D, along two paths. One path is a straight line, while the other is bent by reflection off a mirror. What is the value of b, correct to one decimal place? Assume that all the points in the diagram lie in the same plane. A.
5.4

B.
4.2

C.
3.6

D.
2.8
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The diagram shows rays of light from a point source, P, that reach a detector, D, along two paths.

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The diagram shows rays of light from a point source, P, that reach a detector, D, along two paths. O...