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JEE PHYSICS MCQ: DUAL NATURE OF RADIATION AND MATTER
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Medium
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Analyzing
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Assertion: Work function of a metal is . Two photons each having energy 5 can't eject the electron from the metal.
Reason: More than one photon can't collide simultaneously with an electron.
Reason: More than one photon can't collide simultaneously with an electron.
View answer and explanation
Correct option: A
If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion
Option C is correct because the assertion is true (photons must have energy greater than the work function to eject electrons), and the reason is also true (an electron can only absorb one photon at a time).
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(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