Rainbows are formed due to
Diffraction of light
Dispersion of light
Convergence of light
Divergence of light
The refractive index of a medium is expressed as the ratio of
The speed of light in air to the speed of light in the medium
The speed of light in medium to the speed of light in air
The speed of light in the medium to the speed of light in water
The speed of light in water to the speed of light in the medium
Where will the image be formed when the object is at infinity ?
At F
At F on other side of the lens
At 2F
At 2F on other side of the lens
Name the scientist who is often considered as father of modern physics
Sir.Isaac Newton
Albert Einstein
Christian Huygens
Willebrord Snell
When the object is beyond 2F, the image formed is
at F
at 2F
Between F and 2F
at infinity
The separation of a beam of white light into its constituent colours is known as
Refraction of light
Reflection of light
None of these
The ability of the eye lens to self adjust its focal length is termed as the
Power of accomodation
Persistance of vision
When the light travels along the normal
It bends towards the normal
It bends away from the normal
There is no deviation
The defect of myopia can be corrected by using
Concave lens
Convex lens
Prism
Hypermetropia which develops at an advanced age in life is known as
Myopia
Presbyopia
Cataract