A ray of light travelling in water falls at right angles to the boundary of a parallel-sided glass block. The ray of light :
is refracted towards the normal
is refracted away from the normal
does not get refracted
is reflected along the same path
A ray of light travelling in air goes into water. The angle of refraction will be :
90o
smaller than the angle of incidence
equal to the angle of incidence
greater than the angle of incidence
A ray of light passes from glass into air. The angle of refraction will be :
45o
Phenomenon of bending of light when it travels from one medium to another is
Interference
Refraction
Dispersion
Diffraction
Pick out correct expression for refractive index.
µ = sin(i)sin(r)
None of these
The ratio of the speed of light in vacuum to that in a medium is known as
magnification
refraction
refractive index
Snell's law
A diverging lens is used in :
a magnifying glass
a car to see objects on rear side
spectacles for the correction of short sight
a simple camera
The unability of human eye to see faraway objects
Virtual image
Short sightedness
Long sightedness
Real image
Which of these are used in astronomical laboratories?
Compound microscope
Telescope
Photographic camera
Magnifing glass
The refractive indices of four substances P, Q, R and S are 1.50, 1.36, 1.77 and 1.31 respectively. The speed of light is the maximum in the substance :
P
Q
R
S
