NEET Physics Question - Modern Physics - Photoelectric Effects and deBroglie Equation

Assertion (A): The smaller the wavelength of a photon, the more energy it has.

Reason (R): The smaller the wavelength of a photon, the less momentum it has.

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

(2) Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(3) (A) is true but (R) is false

(4) Both (A) and (R) are false

Solution:

Assertion (A) is true: Energy \(E = hc/\lambda\), so smaller \(\lambda\) means more energy. Reason (R) is false: Momentum \(p = h/\lambda\), so smaller \(\lambda\) means more momentum. (A) is true, (R) is false.

Rankers Physics

Photon Wavelength & Energy

Solution:

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