Pair-Production and Annihilation of Matter Numerical Class-12 Nootan ISC Physics Solution Ch-29 Mass-Energy Equivalence : Nuclear Binding Energy. Step by step solutions of Kumar and Mittal Physics of Nageen Prakashan as council latest prescribe guideline for upcoming exam. Visit official Website CISCE for detail information about ISC Board Class-12 Physics.
Pair-Production and Annihilation of Matter Numerical Class-12 Nootan ISC Physics Solution Ch-29 Mass-Energy Equivalence : Nuclear Binding Energy
| Board | ISC |
| Class | 12 |
| Subject | Physics |
| Book | Nootan |
| Chapter-29 | Mass-Energy Equivalence : Nuclear Binding Energy. |
| Topics | Numericals on Pair-Production and Annihilation of Matter |
| Academic Session | 2025-2026 |
Numericals on Pair-Production and Annihilation of Matter
Class-12 Nootan ISC Physics Solution Ch-29 Mass-Energy Equivalence : Nuclear Binding Energy
Que-7: What should be the minimum energy of a γ-ray photon for the production of an electron-positron pair? What can be the maximum wavelength? The rest-mass of electron (also of positron) is 9.1 × 10^-31 kg.
Ans-
Hence for pair-production, it is essential that the energy of γ-photon must be at least 2 x 0.51 = 1.02 MeV
Maximum wavelength
Que-8: Calculate in joule the energy produced by the interaction of a proton and an antiproton. The mass of proton is 1.6725 x 10^-27 kg.
Ans- The Energy Produced
Que-9: A proton and an antiproton annihilate into two photons of same frequency. What is the wavelength of the photons produced? The mass of proton is 1.67 x 10^-27 kg.
Ans- Suppose that the wavelength λ then
Que-10: The rest mass of a proton is 1.67 x 10^-27 kg. What should be the maximum wavelength of a photon to produce a proton-antiproton pair?
Ans- Maximum wavelength
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