Question

Assertion : The de-Broglie wavelength equation has significance for any microscopic and submicroscopic particles.
Reason :de-Broglie wavelength is inversely proportional to the mass of the object its velocity is constant.

• A. If both the assertion and reason are true and reason explains the assertion.
• B. If both the assertion and reason are true but reason does not explain the assertion.
• C. If assertion is true but reason is false.
• D. If assertion is false but reason is true.

Answer 1

Answer: (A)

As de-Broglie wavelength, $\lambda=\frac{h}{m v}$
So tor constant velocity ${\lambda} \propto \frac{1}{m}$
So, lesser will be the mass greater will be its de-Broglie wavelength.