Red light of wavelength 6600 Å traveling in air gets refracted in water. If the speed of light in air is 3x108 ms-1 and refractive index of water is 4/3. Then the wavelength of light in water is
2950 Å
5920 Å
4950 Å
1950 Å
With increase in angle of incidence of incident light, the angle of deviation produced by the prism.
Decreases
Increases
First decreases, becomes minimum and then increases.
First increases becomes maximum and then decrease.
Total internal reflection occurs when.
No light is allowed to enter or leave a medium
The light travels from a rarer to a denser medium at an angle of incidence greater than the critical angle.
The light travels from a denser to a rarer medium
The light travels from a denser to a rarer medium at an angle of incidence greater than the critical angle.
In refraction of light through a prism, the light ray:
Suffers refraction only at one face of the prism
Emerges out from the prism in a direction parallel to the incident ray.
Bends at both the surface of prism towards its base.
Bends at both the surface of prism opposite to its base.
When a ray of light from air enters a denser medium, it
Bends away from the normal
Bends towards the normal
Goes on deviated
Is reflected back
The refractive index of water is 4/3. It means that
Light travels in water 4/3 times faster than in air.
Light travels in water 4/3 times slower than in air
Light travels in air and in water with the same speed
None of these
Given the apparent depth of a liquid in a vessel is 15cm, when its real depth is 20cm. Then the refractive index of the liquid is.
1. 33
2.33
0
2
The refractive index of glass is 3/2. What is the critical angle for glass – air surface?(sin 42° = 2/3)
38°
48°
42°
39°
A water pond appears to be 2.7m deep. If the refractive index of water is 4/3. Then the actual depth of the pond is
3.6 m
7.2m
4.8m
3.8m
Red light of wavelength 6600 A0 travelling in air gets refracted in water. If the speed of light in air is 3x108 ms-1 and refractive index of water is 4/3. Then the frequency of light in air is.
2.25x108 Hz
4.54 x 10 14Hz
4.54 x 108 Hz
2.54 x 1014 Hz.
