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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
6.
For a concave mirror, if real image is formed the graph between 
and 
is of the form
and is of the form
7.
The spectrum of light emitted by a glowing solid is
8.
A lens of focal projects 
times magnified image of an object on a screen. The distance of the screen from the lens is
projects times magnified image of an object on a screen. The distance of the screen from the lens is
9.
A person uses spectacles of power + 2 D. He is suffering from
10.
A thin plano-convex lens of focal is split into two halves. One of the halves is shifted along the optical axis. The separation between object and image plane is 1.8 m. The magnification of the image formed by one of the half lens is 2. Find the focal-length of the lens and separation between the two halves
is split into two halves. One of the halves is shifted along the optical axis. The separation between object and image plane is 1.8 m. The magnification of the image formed by one of the half lens is 2. Find the focal-length of the lens and separation between the two halves