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NEETPhysicsDual Nature of Matter

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : In Davisson-Germer experiment wavelength associated with the beam decreases with increases of speed of electrons. Reason (R) : Wavelength associated with electron beam in Davission-Germer experiment is given by ( = h 2 mK ) In the light of the above statements, choose the most appropriate answer f

Options

  1. ABoth (A) and (R) are true and (R) is the correct explanation of (A).
  2. BBoth (A) and (R) are true and (R) is NOT the correct explanation of (( A ) ).
  3. C(A) is true but (R) is false.
  4. D(A) is false but (R) is true.

Correct answer

A. Both (A) and (R) are true and (R) is the correct explanation of (A).

Step-by-step solution

To analyze the statements: Assertion (A): "In Davisson-Germer experiment, the wavelength associated with the beam decreases with an increase in the speed of electrons." - This statement is true. According to de Broglie's hypothesis, the wavelength ( ) is inversely proportional to the momentum (p ) of the particle, which is related to its speed. As the speed of electrons increases, the wavelength decreases. Reason (R): "Wavelength associated with the electron beam in Davisson-Germer experiment is given by ( = h 2 m

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