Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Dual Nature of Radiation and Matter question

2011 · Q134
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Physics
  4. /Dual Nature of Radiation and Matter
  5. /2011 · Q134

Dual Nature of Radiation and Matter question

2011 · Q134

NEETPhysicsDual Nature of Radiation and MatterMCQ+4 / −1
Photoelectric emission occurs only when the incident light has more than a certain minimum
  1. A
    power
  2. B
    wavelength
  3. C
    intensity
  4. D
    frequency
View written solutionFree

Correct answer: D

According to Einstein’s photoelectric equation

Kmax = hν\nu ν – hν\nu ν0

Since Kmax is +ve, the photoelectric emission occurs only if

hν\nu ν >\gt > hν\nu ν0 or ν\nu ν >\gt > ν\nu ν0

The photoelectic emission occurs only when the incident light has more than a certain minimum frequency. This minimum frequency is called threshold frequency.

PreviousNext

More from Dual Nature of Radiation and Matter

  • Light of two different frequencies whose photons have energies 1 eV and 2.5 eV respectively illuminate a metallic surface whose work function is 0.5 eV successively. Ratio of maximum speeds of emitted electrons will be2011 · MCQ
  • Electrons used in an electron microscope are accelerated by a voltage of 25 kV. If the voltage is increased to 100 kV then the de-Broglie wavelength associated with the electrons would2011 · MCQ
  • The electron in the hydrogen atom jumps from excited state (n = 3) to its ground state (n = 1) and the photons thus emitted irradiate a photosensitive material. If the work function of the material is 5.1 eV, the stopping potential is…2010 · MCQ
  • When monochromatic radiation of intensity I falls on a metal surface, the number of photoelectrons and their maximum kinetic energy are N and T respectively. If the intensity of radiation is 2I, the number of emitted electrons and…2010 · MCQ
  • A beam of cathode rays is subjected to crossed electric (E) and magnetic fields (B). The fields are adjusted such that the beam is not deflected. The specific charge of the cathode rays is given by (Where V is the potential difference…2010 · MCQ
  • The potential difference that must be applied to stop the fastest photoelectrons emitted by a nickel surface, having work functions 5.01 eV, when ultraviolet light of 200 nm falls on it, must be2010 · MCQ
  • A source S1 is producing, 1015 photons per second of wavelength 5000 A∘​. Another source S2 is producing 1.02 × 1015 photons per second of wavelength 5100 A∘​. Then, (power of…2010 · MCQ
  • The number of photo electrons emitted for light of a frequency υ (higher than the threshold frequency υ0​) is proportional to2009 · MCQ