NCERT Solutions for Chapter: Dual Nature of Radiation and Matter, Exercise 1: MCQ

A particle is dropped from a height $H$. The de Broglie wavelength of the particle as a function of height is proportional to

The wavelength of a photon needed to remove a proton from a nucleus which is bound to the nucleus with $1 \mathrm{MeV}$ energy is nearly

Consider a beam of electrons (each electron with energy $E_o$) incident on a metal surface kept on an evacuated chamber. Then

Suppose the voltage applied to A is increased. The diffracted beam will have the maximum at a value of $\theta$ that

A proton, a neutron, an electron and an $\alpha$-particle have same energy. Then their de Broglie wavelengths compare as

An electron is moving with an initial velocity $v=v_o\hat{\mathrm{i}}$ and is in a magnetic field $\mathrm{B}=B_o\hat{\mathrm{j}}$. Then it's de Broglie wavelength

An electron (mass m) with an initial velocity $\overrightarrow{V}=v_0\widehat{\mathrm{i} }$ , $(v_0>0)$ is in an electric field $\overrightarrow{E}=-E_0\hat{\mathrm{i}}$ ($E_0=$constant $>0$).It's de Broglie wavelength at time $t$ is given by

An electron (mass m) with an initial velocity $v=v_0\hat{i}$ is in an electric field $E=E_0\hat{j}$. If, ${\lambda }_0=\frac{h}{m{v}_0}$, it's de-Borglie wavelength at time $t$ is given by