When a ray of light travelling in glass enters into water obliquely :
it is refracted towards the normal
it is not refracted at all
it goes along the normal
it is refracted away from the normal
A ray of light passes from a medium X to another medium Y. No refraction of light occurs if the ray of light hits the boundary of medium Y at an angle of:
0o
45o
90o
120o
Refractive index of water 1.33. The speed of light through water is
2.25 x 108 m/s
3 x 108 m/s
1.66 x 108 m/s
5 x 108 m/s
Which of these lens are used for image formation in human eye?
Concave lens
Convex lens
Both concave and convex lens
None of these
Pick out correct expression for refractive index.
µ = sin(i)sin(r)
A ray of light passes from glass into air. The angle of refraction will be :
equal to the angle of incidence
greater than the angle of incidence
smaller than the angle of incidence
The ratio of the speed of light in vacuum to that in a medium is known as
magnification
refraction
refractive index
Snell's law
The refraction of light is commonly known as
bending
scattering
reflection
interference
Focal length of convex lens is
1/2 radius of curvature
2 x radius of curvature
equal to radius of curvature
4 x radius of curvature
In optics an object which has higher refractive index is called
optically rarer
optically denser
optical density
