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1.
The radius of curvature of convex surface of a thin plano-convex lens is 15 
and refractive index of its material is 1.6. The power of the lens will be
and refractive index of its material is 1.6. The power of the lens will be
2.
A ray of light is incident on a plane mirror at an angle of 
The angle of deviation produced by the mirror is
The angle of deviation produced by the mirror is
3.
In a simple microscope, if the final image is located at infinity then its magnifying power is
4.
Rainbow is formed due to
5.
An object of length 
is placed on the principal axis of a concave mirror of focal length 
at a distance of 
. The length of the image will be
is placed on the principal axis of a concave mirror of focal length at a distance of . The length of the image will be