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cds- Question :

An oscilloscope is an instrument which allows us to see waves produced by
 

A :

visible light

B :

X-rays
 

C :

sound

D :

Gamma rays

Answer : A
cds- Question :

X-rays are

A :

(a) deflected by an electric field but not by a magnetic field

B :

(b) deflected by a magnetic field but not by an electric field

C :

(c) deflected by both a magnetic field and an electric field

D :

(d) not deflected by an electric field or a magnetic field

Answer : A
cds- Question :

A photon of X-ray has energy of 1 keV. A photon of visible radiation has energy of 3 eV. In this context, which one of the following statements is not correct?

A :

(a) The wavelength of X-ray photon is less than the wavelength of visible radiation photon.

B :

(b} Both the photons have different energies.

C :

(c) The speeds of both the photons in vacuum are different.

D :

(a) The frequency of X-ray photon is higher than the frequency of visible radiation photon.

Answer : A
cds- Question :

Infrared, visible and ultraviolet radiations/light have different properties. Which one of the following statements related to these radiations/light is not correct?
 

A :

(a) The wavelength of infrared is more than that of ultraviolet radiation.
 

B :

(b) The wavelength of ultraviolet is smaller than that of visible light.
 

C :

(c) The photon energy of visible light is more than that of infrared light.
 

D :

(d) The photon energy of ultraviolet is lesser than that of visible light.
 

Answer : a
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