Assertion :According to de Broglie, the wavelengths associtated with electrons and other subatomic particles can be detected experimentally. Reason: The wavelength associated with any material particle is directly proportional to its mass.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is C Assertion is correct but Reason is incorrect
According to de Broglie's equation
$λ = \frac{h}{m v}$
where, $λ =$ de Broglie wavelength
$h = 6.626 \times 10^{- 34} J s$ =Planck's constant
$m$ =mass of particle
mass of electron = $9.110 \times 10^{- 28}$ g
$v$ = speed of particle
thus, for different particles, the wavelength is inversely proportional to their masses
Higher is the mass shorter will be the wavelength associated with it:
Assertion is correct but Reason is incorrect

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