(A) Einstein's photoelectric equation is given by: $K{E_{\max }} = h\nu - \Phi$,where $\Phi = h{\nu _0}$ is the work function of the metal.Comparing t

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Is the same for all metals and independent of the intensity of the radiation

(A) Einstein's photoelectric equation is given by: $K{E_{\max }} = h\nu - \Phi$,where $\Phi = h{\nu _0}$ is the work function of the metal.Comparing this with the equation of a straight line $y = mx + c$,where $y = K{E_{\max }}$ and $x = \nu$ (frequency):$K{E_{\max }} = h\nu - h{\nu _0}$The slope $m$ of this line is equal to $h$ (Planck's constant).Since $h$ is a universal constant,the slope is the same for all metals and is independent of the intensity of the incident radiation.

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

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According to Einstein's photoelectric equation,the plot of the maximum kinetic energy of the emitted photoelectrons from a metal versus the frequency of the incident radiation gives a straight line whose slope:

AIEEE 2004 All AIEEE

A
Is the same for all metals and independent of the intensity of the radiation
B
Depends on the intensity of the radiation
C
Depends both on the intensity of the radiation and the metal used
D
Depends on the nature of the metals used

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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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AIEEE 2004 Paper All AIEEE years →

Statement $-1$: When ultraviolet light is incident on a photocell, its stopping potential is $V_0$ and the maximum kinetic energy of the photoelectrons is $K_{max}$. When the ultraviolet light is replaced by $X$-rays, both $V_0$ and $K_{max}$ increase.
Statement $-2$: Photoelectrons are emitted with speeds ranging from zero to a maximum value because of the range of frequencies present in the incident light.

MediumAIEEE 2010

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Sodium and copper have work functions $2.3 \ eV$ and $4.5 \ eV$ respectively. Then the ratio of their threshold wavelengths is nearest to

EasyAIIMS 2019

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The potential difference that must be applied to stop the fastest photoelectrons emitted by a nickel surface,having work function $5.01 \, eV$,when ultraviolet light of $200 \, nm$ falls on it,must be ............... $V$.

MediumAIPMT 2010

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In the photoelectric effect, the stopping potential depends on:

Easy

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Two photons, each having an energy of $2.5 \ eV$, are incident on a metal surface with a work function of $4.5 \ eV$. Then . . . . . . .

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According to Einstein's photoelectric equation,the plot of the maximum kinetic energy of the emitted photoelectrons from a metal versus the frequency of the incident radiation gives a straight line whose slope:

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Sodium and copper have work functions $2.3 \ eV$ and $4.5 \ eV$ respectively. Then the ratio of their threshold wavelengths is nearest to

The potential difference that must be applied to stop the fastest photoelectrons emitted by a nickel surface,having work function $5.01 \, eV$,when ultraviolet light of $200 \, nm$ falls on it,must be ............... $V$.

In the photoelectric effect, the stopping potential depends on:

Two photons, each having an energy of $2.5 \ eV$, are incident on a metal surface with a work function of $4.5 \ eV$. Then . . . . . . .

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