Question

ans fastly plzz ..
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Answer 1

1) we know that , the normal always passes through the center of curvature in case of spherical mirrors

if the light passes through the center of curvature means angle of incidence is 0°

2)concave mirrors create real and enlarged images hence it cannot be used as a rate view mirror

3)f=R/2

4)oil lamp

I hope this helps ( ╹▽╹ )