(C) The work function $W_0$ is given by $W_0 = h\nu_0$.Given $h = 6.6 \times 10^{-34} Js$ and $\nu_0 = 1.6 \times 10^{15} Hz$.$W_0 = (6.6 \times 10^{-

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(C) The work function $W_0$ is given by $W_0 = h\nu_0$.Given $h = 6.6 \times 10^{-34} Js$ and $\nu_0 = 1.6 \times 10^{15} Hz$.$W_0 = (6.6 \times 10^{-34}) \times (1.6 \times 10^{15}) = 10.56 \times 10^{-19} J$.To convert this into $eV$,divide by the charge of an electron $(1.6 \times 10^{-19} C)$:$W_0 = \frac{10.56 \times 10^{-19}}{1.6 \times 10^{-19}} eV = 6.6 eV$.According to Einstein's photoelectric equation,$K_{max} = E - W_0$.Given incident energy $E = 8 eV$.$K_{max} = 8 eV - 6.6 eV = 1.4 eV$.

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

Medium

$A$ photon of energy $8 eV$ is incident on a metal surface of threshold frequency $1.6 \times 10^{15} Hz$. The maximum kinetic energy of the emitted photoelectrons is ............... $eV$ (Given $h = 6.6 \times 10^{-34} Js$).

A
$4.8$
B
$2.4$
C
$1.4$
D
$0.8$

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Chapter

Dual Nature of Radiation and matter

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Einstein's Photoelectric Equation and Energy Quantum of Radiation

The threshold wavelength for photoelectric emission in tungsten is $400 \ nm$. The wavelength of light that must be used in order to eject electrons with a maximum kinetic energy of $0.9 \ eV$ is .............. $nm$.

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The frequency of the incident light falling on a photosensitive metal plate is doubled. The kinetic energy of the emitted photoelectrons is:

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When green light is incident on the surface of a metal, it emits photo-electrons, but there is no such emission with yellow light. Which one of the following colours can produce emission of photo-electrons?

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The stopping potential $(V_0)$ versus frequency $(\nu)$ plot of a substance is shown in the figure. The threshold wavelength is:

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The work function of a surface of a photosensitive material is $6.2\, eV$. The wavelength of the incident radiation for which the stopping potential is $5\, V$ lies in the

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$A$ photon of energy $8 eV$ is incident on a metal surface of threshold frequency $1.6 \times 10^{15} Hz$. The maximum kinetic energy of the emitted photoelectrons is ............... $eV$ (Given $h = 6.6 \times 10^{-34} Js$).

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The threshold wavelength for photoelectric emission in tungsten is $400 \ nm$. The wavelength of light that must be used in order to eject electrons with a maximum kinetic energy of $0.9 \ eV$ is .............. $nm$.

The frequency of the incident light falling on a photosensitive metal plate is doubled. The kinetic energy of the emitted photoelectrons is:

When green light is incident on the surface of a metal, it emits photo-electrons, but there is no such emission with yellow light. Which one of the following colours can produce emission of photo-electrons?

The stopping potential $(V_0)$ versus frequency $(\nu)$ plot of a substance is shown in the figure. The threshold wavelength is:

The work function of a surface of a photosensitive material is $6.2\, eV$. The wavelength of the incident radiation for which the stopping potential is $5\, V$ lies in the

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