Question

Assertion(A):All microscopic bodies in motion have wave character.
Reason(R): Microscopic bodies have very large mass.

Answer 1

Given,,

Assertion(A):All microscopic bodies in motion have wave character

Ans---In 1924, de-Broglie suggested that just as light exhibits wave and particle properties, all microscopic material particles such as electrons, protons , atoms, molecules, etc. ... Thus, according to de-Broglie, all the material particles in motion possess wave characteristics.

Reason(R): Microscopic bodies have very large mass.

Ans--Mass of microscopic and sub-microscopic particle is very small. Thus according to de broglie equation, these particles tend to behave like a wave with certain finite wavelength which suggests the wave-particle dual nature of such particles like electrons.Thus de Broglie equation has significance for microscopic and sub -microscopic particles.

Thus both Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.

"Hope it help"

Answer 2

Answer:

The assertion(A) is correct but the reason(R) is not the correct explanation.

Explanation:

• According to de Broglie, λ = h/p = h/mv, where p is the momentum, m is mass, and v is the velocity.
• If velocity is constant, then λ will depend upon the mass m.
• Hence, λ and m are inversely proportional, i.e., λ ∝ 1/m.
• The mass of microscopic bodies is very small.
• Hence, when mass is less, the value of λ will be more.
• Therefore, the assertion given, all microscopic bodies in motion have wave character is true.
• However, the reason given, microscopic bodies have very large mass is false. Microscopic bodies have small mass.

Therefore, the assertion 'all microscopic bodies in motion have wave character' is correct but the reason 'microscopic bodies have very large mass' is not the correct explanation.

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