A coin is placed at the bottom of a water tank of depth 0.5m.The critical angle for water is about 49o.The depth changes when we look at the coin at different angles with the surface of water.What is the maximum value of the apparent depth of the coin?
0.5m
0.5*tan 49o
0.5*sin49o
0.5*Cos 40o
Critical angle of light passing from glass to air is minimum for?
red colour
green colour
yellow colour
blue colour
What is the minimum distance between an object and its real image formed by a convex lens?
0
F
2F
4F
A rays light passes through an equivalent prism such that the angle of incidence is equal to the angle of emergence and the later is equal to (3/4)th the angle of prism. The angle of deviation is
450
390
200
300
Light goes from medium M1 to the medium M2. In which of the following cases, we are likely to get the weakest refracted beam?
M1= glass, M2= diamond
M1= Water, M2= glass
M1= water, M2= diamond
M1= diamond, M2= glass.
Light travels through a glass plate of thickness 't' and having refractive index μ. If c is the velocity of light in vacuum, the time taken by light to travel this thickness of glass is
μt/c
t/μC
μt C
tC/μ
A ray of light of wavelength 720nm is refracted into a medium of refractive index 1.5. what is the wavelength of light in the medium?
1080nm
720nm
480nm
3600nm
A ray of light is incident at 600 on one face of a prism which has angle 300. The angle between the emergent ray and incident ray is 300. What is the angle between the ray and the face from which it emerges?
00
600
900
The object is placed at a distance n times the focal length of a concave lens. The linear magnification the object is
1/ (n+1)
(1/n)+1
1/ (n-1)
(1/n)-1
A liquid is placed in a hollow prism of angle 600. If the angle of minimum deviation is 300, what is the refractive index of the liquid?
1.41
1.50
1.65
1.95
