Navigate

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

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

Options

(a) power
(b) wavelength
(c) intensity
(d) frequency

Correct Answer:

frequency

Explanation:

For occurence of photoelectric effect, the incident light should have frequency more than a certain minimum which is called the threshold frequency (v₀).
We have, 1/2 mv² = hv – hv₀
for photoelecric effect emission v > v₀ where v is the frequency of the incident light.

AIPMT2011
admin:

Related Questions

  1. Perfectly black body radiates the energy 18 J/s at 300K. Another ordinary body of e=0.8
  2. Diameter of the objective of a telescope is 200 cm. What is the resolving power
  3. A 200 W sodium street lamp emits yellow light of wavelength 0.6 µm
  4. A body is thrown with a velocity of 9.8 m/s making angle of 30° with the horizontal
  5. A calorimeter contains 0.2 kg of water at 30° C. 0.1kg of water at