Embibe Experts Solutions for Chapter: Dual Nature of Matter and Radiation, Exercise 1: Exercise - 1

The maximum kinetic energy of photoelectrons emitted from a surface when photons of energy $6 \mathrm{eV}$ fall on it is $4 \mathrm{eV}.$The stopping potential is:

A particle of mass $M$ at rest decays into two particles of masses $m_1$ and $m_2$ having non zero velocities. The ratio of the de Broglie's wavelengths of the particles, ${\lambda }_1/{\lambda }_2$ is:

Let $p$ and $E$ denote the linear momentum and the energy of a photon. For another photon of smaller wavelength (in same medium)

The de Broglie wavelength of a neutron corresponding to root mean square speed at $927°\mathrm{C}$ is $\lambda$. What will be the de Broglie wavelength of the neutron corresponding to root mean square speed at $27°\mathrm{C}$?

The wavelength $\lambda$ of de Broglie waves associated with an electron (mass $m$, charge $e$) accelerated through a potential difference of $V$ is given by ($h$ is Planck’s constant) :

In Davisson-Germer experiment, the filament emits

In the Davisson and Germer experiment, the velocity of electrons emitted from the electron gun can be increased by :

Energy evolved from the fusion reaction $2 {}_1{}^2\mathrm{H} = 2{}_1{}^4\mathrm{He} \mathrm{Q}$ is to be used for the production of power. Assuming the efficiency of the process to be $30 \%.$Find the mass of deuterium that will be consumed in a second for an output of $50 \mathrm{MW}. {}_1\mathrm{He}^4 = 4.002603 \mathrm{amu} \mathrm{and} {}_1\mathrm{H}^2 = 2.014102 \mathrm{amu}.$