Dual Nature of Matter

When the light of frequency $2\nu\,_{0}$ (where $\nu\,_{0}$ is threshold frequency), is incident on a metal plate, the maximum velocity of electrons emitted is $v_{1}$. When the frequency of the incident radiation is…

The stopping potential $V_{o}$ (in volt) as a function of frequency $(v)$ for a sodium emitter, is shown in the figure. The work function of sodium, form the data plotted in the figure, will be: (Given: Planck's…

Particle $A$ of mass $\text{m}_{\text{A}}=\frac{\text{m}}{2}$ moving along the $\text{x}$ -axis with velocity $\text{v}_{0}$ collides elastically with another particle $\text{B}$ at rest having mass…

An electron (mass $m$) with an initial velocity $\vec{v}=v_{0}\hat{i}\left(v_{0}>0\right)$ is moving in an electric field $\vec{E}=-E_{0}\hat{i}\left(E_{0}>0\right)$ where $E_{0}$ is constant. If at $t=0$,de-Broglie…

A particle of mass $9.1\times\,10^{-31}\mathrm{kg}$ travels in a medium with a speed of $10^{6}ms^{-1}$ and a photon of radiation of linear momentum $10^{-27}\mathrm{kg}ms^{-1}$ travels in a vacuum. The wavelength of…

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : The photoelectric effect does not takeplace, if the energy of the incident radiation is less than the…

When light of frequency twice the threshold frequency is incident on the metal plate, the maximum velocity of emitted electron is $v_{1}$. When the frequency of incident radiation is increased to five times the…

A beam of electrons of energy E scatters from a target having atomic spacing of $1\AA$. The first maximum intensity occurs at $\theta\,=60^{\circ}.$ Then $E(\mathrm{in}\mathrm{eV})$ is........ (Planck's constant…

The stopping potential for photoelectrons emitted from a surface illuminated by light of wavelength $6630\AA\,$is $0.42V$. If the threshold frequency is $x\times\,10^{13}s$, where $x$ is (nearest integer): (Given, speed…

Match List$-I$ (Experiment performed) with List$-\mathrm{II}$(Phenomena discovered/associated)and select the correct option from the options given below the lists List-I List-II $(a)$ Davissonand Germerexperiment…

The surface of a metal is illuminated alternately with photons of energies $E_{1}=4\mathrm{eV}$and$E_{2}=2.5\mathrm{eV}$respectively.The ratio of maximum speeds of the photoelectrons emitted in the two cases is $2.$ The…

Given below are two statements : Statement I : Stopping potential in photoelectric effect does not depend on the power of the light source. Statement II : For a given metal, the maximum kinetic energy of the…