(C) The energy of the photon emitted during the transition from $n=2$ to $n=1$ is given by:$E = E_2 - E_1 = -\frac{13.6}{2^2} - (-\frac{13.6}{1^2}) =

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(C) The energy of the photon emitted during the transition from $n=2$ to $n=1$ is given by:$E = E_2 - E_1 = -\frac{13.6}{2^2} - (-\frac{13.6}{1^2}) = -3.4 + 13.6 = 10.2 \ eV$.According to Einstein's photoelectric equation:$E = \phi + K_{max}$, where $\phi$ is the work function and $K_{max} = eV_s$ is the maximum kinetic energy.$10.2 \ eV = 4.2 \ eV + eV_s$.$eV_s = 10.2 \ eV - 4.2 \ eV = 6.0 \ eV$.Therefore, the stopping potential $V_s = 6 \ V$.

Class 12 Physics Dual Nature of Radiation and matter Einstein's Photoelectric Equation and Energy Quantum of Radiation

Medium

An electron in a Hydrogen atom jumps from the second Bohr orbit to the ground state, and the difference between the energies of the two states is radiated in the form of a photon. This photon strikes a material. If the work function of the material is $4.2 \ eV$, then the stopping potential is (Energy of electron in $n$-th orbit $= -\frac{13.6}{n^2} \ eV$). (in $V$)

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A
$2$
B
$4$
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$6$
D
$8$

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Class 12

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Dual Nature of Radiation and matter

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Einstein's Photoelectric Equation and Energy Quantum of Radiation

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Two light beams of different frequencies,having energies $1 \ eV$ and $2.5 \ eV$ respectively,are incident on a metal surface with a work function of $0.5 \ eV$. The ratio of the maximum kinetic energies of the emitted photoelectrons is:

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Einstein's photoelectric equation states that ${E_k} = h\nu - \phi$. In this equation,${E_k}$ refers to:

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For two different photosensitive materials having work functions $\phi$ and $2 \phi$ respectively,which are illuminated with light of sufficient energy to emit electrons,if the graph of stopping potential $(V_s)$ versus frequency $(\nu)$ is drawn for these two materials,what is the ratio of the slopes of the graphs for these two materials?

MediumMHT CET 2025

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When radiation of the wavelength $\lambda$ is incident on a metallic surface,the stopping potential is $4.8 \ V$. If the same surface is illuminated with radiation of double the wavelength,then the stopping potential becomes $1.6 \ V$. Then,the threshold wavelength for the surface is :

MediumAP EAMCET 2003

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In an experiment on the photoelectric effect,a student plots the stopping potential $V_0$ against the reciprocal of the wavelength $1/\lambda$ of the incident light for two different metals $A$ and $B$. These are shown in the figure. Looking at the graphs,you can most appropriately say that:

DifficultJEE MAIN 2013

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Two light beams of different frequencies,having energies $1 \ eV$ and $2.5 \ eV$ respectively,are incident on a metal surface with a work function of $0.5 \ eV$. The ratio of the maximum kinetic energies of the emitted photoelectrons is:

Einstein's photoelectric equation states that ${E_k} = h\nu - \phi$. In this equation,${E_k}$ refers to:

When radiation of the wavelength $\lambda$ is incident on a metallic surface,the stopping potential is $4.8 \ V$. If the same surface is illuminated with radiation of double the wavelength,then the stopping potential becomes $1.6 \ V$. Then,the threshold wavelength for the surface is :

In an experiment on the photoelectric effect,a student plots the stopping potential $V_0$ against the reciprocal of the wavelength $1/\lambda$ of the incident light for two different metals $A$ and $B$. These are shown in the figure. Looking at the graphs,you can most appropriately say that:

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