Radiation of any frequency can pull out electrons from a metal. Say true or false.

Radiation of a given wavelength causes electrons to be emitted from the surface of one metal but not from the surface of another metal. Explain why this could be

Any radiation in the ultraviolet region of hydrogen spectrum is able to eject photoelectrons from a metal. What should be the maximum value of threshold frequency for the metal?

Which of the following statements about photoelectric effict is/are false ? (i) It exhibits the particle nature (ii) Electrons are emitted only if the radiation has a frequency above a certain value (iii) All the electrons emitted by radiation of a particular frequency have the same energy (iv) Changing the intensity of radiation changes the maximum energy with which the electrons can be emitted

Assertion(A): Threshold frequency is a characteristic for a metal Reason(R): Threshold frequency is a maximum frequency required for the ejection of electron from the metal surface.

Any radiation in the ultra violet region of Hydrogen from a metal . Then the metal is, nearly

Out of microwaves, ultraviolet rays and infra-red rays, which radiations will be most effective for emission of electrons from metallic surface?

According to Maxwell's theory of electron dynamics, an electron going in a circle should emit radiation of frequency equal to its frequency of revolution. What should be the wavelength of the radiation emitted by a hydrogen atom in the ground state if this rule is followed?

For photoelectric emission from certain metal the cut - off frequency is v . If radiation of frequency 2 v impinges on the metal plate , the maximum possible velocity of the emitted electron will be ( m is the electron mass).

Assertion : For photoelectric effect to occur , the energy of incident radiation falling on the metal plate should be greater than the work function of metal. Reason : Incident light of any frequency , if its intensity is high enough , is capable of emitting electrons from the metal surface.