Cathode ray consists of

A discharge takes place between the two electrodes on applying the electric field to the gas in the discharge tube. The cause of this fluorescence was attributed to

The presently accepted value of charge/mass (e/m) is

In which of the following, emission of electrons does not take place?

 Photoelectric emission occurs only when the incident light has more than a certain minimum

Which of the following when falls on a metal will emit photoelectrons ?

Particle like behavior of light arises from the fact that each quanta of light has definite …X… and a fixed value of …Y.. just like a particle, Here, X and Y refer to

The wave nature of light was established by (i) Maxwell’s equations (ii) Fraunhoffer’s lines (iii) Hertz experiment (iv) Einstein’s theory

The work-function of a metal is

The work function of a metal is independent of

(i) nature of the surface of the metal

(ii) dimensions of the metal

(iii) properties of the metal

(iv) abundance of the metal

The theory of quantisation of electric charge was given by

In photoelectric effect, electrons are ejected from metals,if the incident light has a certain minimum

Which of the following metals is not sensitive to visible light?

A photosensitive substance emits _____when illuminated by light.

The photoelectric current does not depend upon the

(i) frequency of incident light

(ii) work function of the metal

(iii) stopping potential

(iv) intensity of incident light

The stopping potential is directly related to

The wave theory of light does not explain

Photoelectric effect can be explained by

In Einstein’s picture of Photoelectric emission, the photoelectric emission does not take place by

The particle nature of light is not confirmed by

Photons are deflected by

Electrically, photons are

In a photon-particle collision, the quantity that does not remain conserved is

Of the following properties, the photon does not possess

It is essential to consider light as a stream of photons to explain

Photoelectric effect was discovered by

The momentum of a photon of wavelength λ is

The photo-electrons emitted from a metal surface are such that their velocity

Photoelectric effect shows

A photoelectric cell converts

Light of a particular frequency 􀁑 is incident on a metal surface.When the intensity of incident radiation is increased, the photo electric current

The photoelectric effect is based on the law of conservation of

The photoelectric effect can be understood on the basis of

When light is incident on a metal surface the maximum kinetic energy of emitted electrons

The maximum energy of electrons released in a photocell is independent of

Einstein’s photoelectric equation states that

hν = W0 + Ek.

In this equatin, Ek refers to the

In the photoelectric effect, electrons are emitted

The minimum energy required to eject an electron, from the metal surface is called

The work function for photoelectric effect

Photoelectric effect is the phenomenon in which

A photoelectric cell is a device which

Which of the following shows particle nature of light?