Answers

2016-02-17T07:34:26+05:30
1.The angle of incidence 'i' is equal to the angle of reflection r 
2.A ray of light incident normally on a surface is reflected back along the same path.
3.The incident ray,the reflected ray and the normal at the point of incidence ,lie on the same plane.
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2016-02-17T07:59:13+05:30
The two precautions are 1) Mirror should be highly polished to avoid scattering of light 2) Mirror should be silvered(coated with opaque substance on other side) to avoid refraction. Brainliest if Useful
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