Verified Solution • 2025–26 Session moderate

QJEEM21Ph212e: JEE Main 2021 Physics - Class 12 JEEM21Ph212e Solution: Given below are two statements : Statement I : Two photons…

Given below are two statements :

Statement I : Two photons having equal linear momenta have equal wavelengths.

Statement II : If the wavelength of photon is decreased, then the momentum and energy of a photon will also decrease.

In the light of the above statements, choose the correct answer from the options given below.

Multiple Choice Options

  • A Statement I is false but Statement II is true
  • B Both Statement I and Statement II are false
  • C Both Statement I and Statement II are true
  • D Statement I is true but Statement II is false

Step-by-Step Verified Solution

As we know, λ=hp=h2mK\lambda = {h \over p} = {h \over {\sqrt {2mK} }}

If linear momenta of two photons are equal, then their wavelengths is also equal.

Also, if the wavelength is decreased, then the momentum and energy of photon will increase.

Hence, option (d) is correct.

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