Class 12PhysicsDual Nature of Radiation and MatterEinstein's Photoelectric Equation and Energy Quantum of Radiation
MediumWhen a photon of energy $4.0 \; eV$ strikes the surface of a metal $A$,the ejected photoelectrons have maximum kinetic energy $T_{A} \; eV$ and de-Broglie wavelength $\lambda_{A}$. The maximum kinetic energy of photoelectrons liberated from another metal $B$ by a photon of energy $4.50 \; eV$ is $T_{B} = (T_{A} - 1.5) \; eV$. If the de-Broglie wavelength of these photoelectrons is $\lambda_{B} = 2 \lambda_{A}$,then the work function of metal $B$ is ............. $eV$.
- A$3$
- B$2$
- C$4$
- D$1.5$
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Similar Questions
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 photoelectron depends on the wavelength of the incident light.
In the light of the above statements,choose the most appropriate answer from the options given below.
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 photoelectron depends on the wavelength of the incident light.
In the light of the above statements,choose the most appropriate answer from the options given below.
When radiation is incident on a photoelectron emitter,the stopping potential is found to be $9 \ V$. If $e/m$ for the electron is $1.8 \times 10^{11} \ C \ kg^{-1}$,the maximum velocity of the ejected electrons is:
Medium
View SolutionThe photoelectric threshold wavelength for a certain metal surface is $3300 \,\mathring{A}$. What is the maximum kinetic energy of the photoelectrons emitted if radiations of wavelength $1100 \,\mathring{A}$ are used?
Easy
View SolutionMatch the temperature of a black body given in List-$I$ with an appropriate statement in List-$II$, and choose the correct option.
[Given: Wien's constant as $2.9 \times 10^{-3} \, m-K$ and $\frac{hc}{e}=1.24 \times 10^{-6} \, V-m$ ]
List-$I$ List-$II$ $(P)$ $2000 \, K$ $(1)$ The radiation at peak wavelength can lead to emission of photoelectrons from a metal of work function $4 \, eV$ $(Q)$ $3000 \, K$ $(2)$ The radiation at peak wavelength is visible to human eye. $(R)$ $5000 \, K$ $(3)$ The radiation at peak emission wavelength will result in the widest central maximum of a single slit diffraction. $(S)$ $10000 \, K$ $(4)$ The power emitted per unit area is $1/16$ of that emitted by a blackbody at temperature $6000 \, K$. $(5)$ The radiation at peak emission wavelength can be used to image human bones.
[Given: Wien's constant as $2.9 \times 10^{-3} \, m-K$ and $\frac{hc}{e}=1.24 \times 10^{-6} \, V-m$ ]
| List-$I$ | List-$II$ |
| $(P)$ $2000 \, K$ | $(1)$ The radiation at peak wavelength can lead to emission of photoelectrons from a metal of work function $4 \, eV$ |
| $(Q)$ $3000 \, K$ | $(2)$ The radiation at peak wavelength is visible to human eye. |
| $(R)$ $5000 \, K$ | $(3)$ The radiation at peak emission wavelength will result in the widest central maximum of a single slit diffraction. |
| $(S)$ $10000 \, K$ | $(4)$ The power emitted per unit area is $1/16$ of that emitted by a blackbody at temperature $6000 \, K$. |
| $(5)$ The radiation at peak emission wavelength can be used to image human bones. |
When photons of wavelength $\lambda_1$ are incident on an isolated sphere,the corresponding stopping potential is found to be $V$. When photons of wavelength $\lambda_2$ are used,the corresponding stopping potential is thrice that of the above value. If light of wavelength $\lambda_3$ is used,then find the stopping potential for this case.
DifficultJEE MAIN 2016
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