Objective Question Papers
Chapter 11: Dual Nature of Matter and Radiation
Que 1: Cathode ray consists of
Que 2: 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
Que 3: The presently accepted value of charge/mass (e/m) is
Que 4: In which of the following, emission of electrons does not take place?
Que 5: Photoelectric emission occurs only when the incident light has more than a certain minimum
Que 6: Which of the following when falls on a metal will emit photoelectrons?
Que 7: 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
Que 8: The wave nature of light was established by (i) Maxwell’s equations (ii) Fraunhoffer’s lines (iii) Hertz experiment (iv) Einstein’s theory
Que 9: The work-function of a metal is
Que 10: 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
Que 11: The theory of quantisation of electric charge was given by
Que 12: In photoelectric effect, electrons are ejected from metals, if the incident light has a certain minimum
Que 13: Which of the following metals is not sensitive to visible light?
Que 14: A photosensitive substance emits _____when illuminated by light.
Que 15: 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
Que 16: The stopping potential is directly related to
Que 17: The wave theory of light does not explain
Que 18: Photoelectric effect can be explained by
Que 19: In Einstein’s picture of Photoelectric emission, the photoelectric emission does not take place by
Que 20: The particle nature of light is not confirmed by
Que 21: Photons are deflected by
Que 22: Electrically, photons are
Que 23: In a photon-particle collision, the quantity that does not remain conserved is
Que 24: Of the following properties, the photon does not possess
Que 25: It is essential to consider light as a stream of photons to explain