The most energetic electromagnetic radiations are
Micro waves
Ultraviolet waves
X - rays
Gamma rays
Which wave has a wavelength of 0.01 Ao?
Gamma ray
Ultraviolet ray
Radio waves
The region beyond the violet end of the spectrum is __________
Ultraviolet
Infrared
Microwaves
X-rays
When sunlight enters the earth's atmosphere which colour of light is scattered the least?
Red light
Blue light
Green light
Violet light
In white light of sun, maximum scattering by the air molecules present in the earth's atmosphere for
Red colour
Yellow colour
Green colour
Blue colour
The subjective property of light related to its wavelength is
Speed
Frequency
Colour
None of these
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
How would the sky appear when seen from the space?
White
Black
Yellow
Blue
In glass, when wavelength of light increases then speed of light _________
Decreases
Increases
Remains constant
Which of the following has the highest penetrating power?
Infrared radiations
