Explain ray diagram and derive first law of reflection from that?
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A ray diagram is a diagram that traces the path that light takes in order for a person to view a point on the image of an object. On the diagram, rays (lines with arrows) are drawn for the incident ray and the reflected ray.
The law of reflection of light states that the angle at which a ray is incident on a reflective surface is equal to the angle at which it is reflected from the surface. In other words, in the following diagram (light travels from A to O to B), θi=θr.
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