Back to DUAL NATURE OF RADIATION AND MATTER
JEE PHYSICS MCQ: DUAL NATURE OF RADIATION AND MATTER
1
Medium
1 of 1
Application
+4 | -1
When a piece of metal is illuminated by a monochromatic light of wavelength then stopping potential is When same surface is illuminated by light of wavelength , then stopping potential becomes The value of threshold wavelength for photoelectric emission will be
View answer and explanation
Correct option: A
Option A () is correct because it is derived from Einstein's photoelectric equation by setting up two equations based on the given stopping potentials and wavelengths, then solving for the threshold wavelength.
More Questions from DUAL NATURE OF RADIATION AND MATTER
Practice All Chapter MCQs →
The electrons are emitted in the photoelectric effect from a metal surface
What is the de Broglie wavelength of a bullet of mass 0.04 kg travelling at the speed of 1 km/s?
Photoelectrons are emitted from a metal surface when UV light of wavelength is incident on it. The minimum negative potential required to stop the emission of electrons is . Calculate:
(i) the energy of the incident photons
(ii) the maximum kinetic energy of the photoelectrons emitted. An electron is accelerated by a potential difference of V volt to acquire kinetic energy equal to maximum kinetic energy of ejected photoelectron from a metal of work function 3.2 eV, using a light of wavelength Value of V is Two monochromatic beams and of equal intensity , hit a screen. The number of photons hitting the screen by beam is twice that by beam . Then, what can inference you about their frequencies? A 5 W source emits monochromatic light of wavelength . When placed 0.5 m away, it liberates photoelectrons from a photosensitive metallic surface. When the source is moved to a distance of 1.0m, the number of photoelectrons liberated will be reduced by a factor of
(i) the energy of the incident photons
(ii) the maximum kinetic energy of the photoelectrons emitted. An electron is accelerated by a potential difference of V volt to acquire kinetic energy equal to maximum kinetic energy of ejected photoelectron from a metal of work function 3.2 eV, using a light of wavelength Value of V is Two monochromatic beams and of equal intensity , hit a screen. The number of photons hitting the screen by beam is twice that by beam . Then, what can inference you about their frequencies? A 5 W source emits monochromatic light of wavelength . When placed 0.5 m away, it liberates photoelectrons from a photosensitive metallic surface. When the source is moved to a distance of 1.0m, the number of photoelectrons liberated will be reduced by a factor of