Which of the following are not the factors on which the deviation produced by a prism depends ?
The angle of incidence at the first surface
The angle of prism
The angle of refraction at second surface
The refractive index of the material of the prism
Dispersion of light by a glass prism takes place because
The light of different colours have different intensities
The light of different colours have different speeds in a medium
The light of different colours have different frequencies
The light of different colours have different energies
Among all the electromagnetic waves, which of the following has longest wavelength?
Micro waves
Gamma rays
Radio waves
infrared radiation
When sunlight enters the earth's atmosphere which colour of light is scattered the most?
Violet
Red
Blue
Green
In glass, when wavelength of light increases then speed of light _________
Decreases
Increases
Remains constant
None of these
How would earth appear when seen from space?
Black
White
The frequency range of visible part of electromagnetic spectrum is
4000 - 8000 Hz
3.75 × 1014 - 7.5 × 1014 Hz
400 - 800 MHz
4 - 8 MHz
The range of wavelength of the electromagnetic waves visible to us is ____________
4000 Ao to 8000 Ao
2000Ao to 4000Ao
100Ao to 4000Ao
0.1Ao to 100Ao
The photographic dark rooms are provided with _________ lamps
Infrared
Ultraviolet
Microwave
The source of ultraviolet light is
Electric bulb
Red hot iron ball
Sodium vapour lamp
Carbon arc - lamp
