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Dual Nature of Radiation and matter question bank (Physics)

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Q1.

An electromagnetic wave of wavelength $\lambda$ is incident on a photosensitive surface of negligible work function. If the photoelectrons emitted from this surface have the de-Broglie wavelength $\lambda_{1}$,then:

(A)

$\lambda \propto \frac{1}{\lambda_{1}}$

(B)

$\lambda \propto \lambda_{1}$

(C)

$\lambda \propto \lambda_{1}^{2}$

(D)

$\lambda \propto \frac{1}{\lambda_{1}^{2}}$

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Q2.

The momentum of a photon of energy $1 \text{ MeV}$ in $\text{kg-m/s}$ will be

(A)

$0.33 \times 10^{6}$

(B)

$7 \times 10^{-24}$

(C)

$10^{-22}$

(D)

$5 \times 10^{-22}$

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