(D) The rest mass energy of an electron $(e^-)$ is $0.51 \, MeV$.Since a positron $(e^+)$ has the same rest mass as an electron,its rest mass energy i

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(D) The rest mass energy of an electron $(e^-)$ is $0.51 \, MeV$.Since a positron $(e^+)$ has the same rest mass as an electron,its rest mass energy is also $0.51 \, MeV$.For pair production,the photon must provide energy equal to the sum of the rest mass energies of the electron and the positron.Minimum energy $E = m_e c^2 + m_p c^2 = 0.51 \, MeV + 0.51 \, MeV = 1.02 \, MeV$.

Class 12 Physics Dual Nature of Radiation and matter Particle Nature of Light : Photon

Easy

An electron-positron pair is created by $\gamma$-rays. What is the minimum energy of the $\gamma$-rays required for this process in $MeV$?

A
$5$
B
$4.02$
C
$15$
D
$1.02$

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Class 12 Questions

Class 12

Physics Questions

Chapter

Dual Nature of Radiation and matter

Subtopic

Particle Nature of Light : Photon

Which of the following is not a property of photons?

EasyMHT CET 2008

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Find the number of photons emitted per second by a $10 \ kW$ radio transmitter operating at a wavelength of $500 \ m$.

Medium

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$A$ photon has a wavelength of $3 \,nm$. Its momentum and energy, respectively, will be:
$[h = 6.63 \times 10^{-34} \,Js, c = 3 \times 10^8 \,m/s]$

DifficultMHT CET 2021

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Which one of these is non-divisible?

Easy

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An electron with rest mass $m_{0}$ moves with a speed of $0.8 c$. Its mass when it moves with this speed is

MediumAIPMT 1991

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An electron-positron pair is created by $\gamma$-rays. What is the minimum energy of the $\gamma$-rays required for this process in $MeV$?

Similar Questions

Which of the following is not a property of photons?

Find the number of photons emitted per second by a $10 \ kW$ radio transmitter operating at a wavelength of $500 \ m$.

$A$ photon has a wavelength of $3 \,nm$. Its momentum and energy, respectively, will be: $[h = 6.63 \times 10^{-34} \,Js, c = 3 \times 10^8 \,m/s]$

Which one of these is non-divisible?

An electron with rest mass $m_{0}$ moves with a speed of $0.8 c$. Its mass when it moves with this speed is

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$A$ photon has a wavelength of $3 \,nm$. Its momentum and energy, respectively, will be:
$[h = 6.63 \times 10^{-34} \,Js, c = 3 \times 10^8 \,m/s]$