The defect of hypermetropia may be corrected by using
Concave lens
Convex lens
Prism
None of these
Which of the following joins the centres of curvatures of the two spherical surface of the lens?
Centre of curvature
Radius of curvature
Principal axis
Optical centre
Name the scientist who is often considered as father of modern physics
Sir.Isaac Newton
Albert Einstein
Christian Huygens
Willebrord Snell
When we stand in sunlight we feel the heat due to the presence of
Infrared radiation
Ultraviolet radiation
Radio waves
Electromagnetic radiation
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
The small aperture in the centre of the iris is called
Eye lens
retina
Ciliary muscles
Pupil
Rainbows are formed due to
Diffraction of light
Dispersion of light
Convergence of light
Divergence of light
The ability of the eye lens to self adjust its focal length is termed as the
Power of accomodation
Persistance of vision
Reflection of light
The phenomenon in which electrons are released from matter on absorption of light energy is called
Photoelectric effect
Refraction
Dispersion
When the light travels along the normal
It bends towards the normal
It bends away from the normal
There is no deviation
