NEET
- Exam
- NEET
- Subject
- Physics
- Chapter
- Dual Nature of Matter
NEET · Physics · Dual Nature of Matter
For photoelectric effect which of the following statements are...
For photoelectric effect which of the following statements are true.
I) The kinetic energies of the photoelectrons do not depend on the frequency of light
II) Photoelectric effect will always occur for highly intense light
III) The maximum kinetic energy of photoelectron does not depend upon the intensity of the light
IV) The escaping electron's kinetic energy is larger for larger frequency
I) The kinetic energies of the photoelectrons do not depend on the frequency of light
II) Photoelectric effect will always occur for highly intense light
III) The maximum kinetic energy of photoelectron does not depend upon the intensity of the light
IV) The escaping electron's kinetic energy is larger for larger frequency
Options
- AI and II only
- BII and III only
- CIII and IV only
- DIV and I only
Correct answer
C. III and IV only
Step-by-step solution
The maximum kinetic energy of the photoelectrons depends on the frequency of incident light and does not depend on the intensity of light.
{K}_\max = hν - ϕ
Therefore, statement III and IV are correct and I is incorrect.
Photoelectric effect happens when insident radiation ha frequency greater than minimum frequency called as threshold frequency. Therefore, statement II is incorrect.