Embibe Experts Solutions for Chapter: Dual Nature of Matter and Radiation, Exercise 4: Exercise (Conceptual Questions)

In Davisson-Germer experiment, the filament emits
 

The diffracted waves in the Davisson-Germer experiment are due to:

A proton is about $1840$ times heavier than an electron. When it is accelerated by a potential difference of $1 \mathrm{kV}$, its kinetic energy will be

If an electron and a photon propagate with same wavelength, it implies that they have the same,

According to de-Broglie's, wavelength of electron in second orbit is ${10}^{–9} \mathrm{m}$. Then, the circumference of the orbit is

An electron and proton are accelerated through same potential. Then, the ratio of the wavelengths associated with the electron and proton, $\frac{{\mathrm{\lambda }}_{\mathrm{e}}}{{\mathrm{\lambda }}_{\mathrm{p}}}$ will be

An electron, a proton and an alpha particle have same kinetic energy. The corresponding de-Broglie's wavelength would have the following relationship,

If ${\mathrm{\lambda }}_{\mathrm{p}} \text{and} {\mathrm{\lambda }}_{\alpha }$ be the wavelengths of protons and $\alpha$-particles of equal kinetic energies, then,