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In Raman effect
- a)A phonan is scattered inelastically by a crystal with creation or annihilation of a phonan or magnon
- b)The mean free path of low enargy electron is increases in an inert gas.
- c)Certain transparent substance become doubly refracting when an electric field is applied at right angle to the direction of incident light.
- d)A phonan collide with photon and create free electron
Correct answer is option 'A'. Can you explain this answer?
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In Raman effecta)A phonan is scattered inelastically by a crystal with...
Raman Effect:
The Raman effect is a phenomenon in which the light scattered by a molecule or crystal undergoes a change in wavelength. It was discovered by the Indian physicist Sir Chandrasekhara Venkata Raman in 1928 and earned him the Nobel Prize in Physics in 1930. The Raman effect is widely used in spectroscopy to study the vibrational and rotational modes of molecules, as well as the crystal lattice vibrations in solids.
Explanation of Option 'A':
In the context of the Raman effect, option 'A' states that a phonon is scattered inelastically by a crystal with the creation or annihilation of a phonon or magnon. Let's break down this statement to understand it better:
Phonon:
- Phonons are quantized lattice vibrations or collective excitation modes in a crystal lattice. They can be thought of as packets of vibrational energy that propagate through the crystal.
- Phonons are analogous to photons in the sense that they can be created or annihilated during scattering processes.
Inelastic Scattering:
- Inelastic scattering refers to a scattering process in which the energy of the scattered particle (in this case, a phonon) changes.
- In the Raman effect, when light interacts with a crystal, it can scatter off the lattice vibrations (phonons) present in the crystal.
- The scattered light can gain or lose energy, resulting in a change in its frequency or wavelength.
- This change in frequency is known as the Raman shift, and it provides information about the vibrational modes of the crystal.
Creation or Annihilation of Phonons or Magnons:
- During the scattering process, a phonon can be created or annihilated in the crystal.
- Similarly, a magnon (a quantum of magnetic excitation) can also be created or annihilated.
- These processes contribute to the energy exchange between the incident light and the crystal lattice vibrations.
- The creation or annihilation of phonons or magnons leads to the observed Raman scattering and the resulting change in frequency or wavelength of the scattered light.
Therefore, option 'A' is correct as it accurately describes the scattering process in the Raman effect, where a phonon is scattered inelastically by a crystal with the creation or annihilation of a phonon or magnon.
The Raman effect is a phenomenon in which the light scattered by a molecule or crystal undergoes a change in wavelength. It was discovered by the Indian physicist Sir Chandrasekhara Venkata Raman in 1928 and earned him the Nobel Prize in Physics in 1930. The Raman effect is widely used in spectroscopy to study the vibrational and rotational modes of molecules, as well as the crystal lattice vibrations in solids.
Explanation of Option 'A':
In the context of the Raman effect, option 'A' states that a phonon is scattered inelastically by a crystal with the creation or annihilation of a phonon or magnon. Let's break down this statement to understand it better:
Phonon:
- Phonons are quantized lattice vibrations or collective excitation modes in a crystal lattice. They can be thought of as packets of vibrational energy that propagate through the crystal.
- Phonons are analogous to photons in the sense that they can be created or annihilated during scattering processes.
Inelastic Scattering:
- Inelastic scattering refers to a scattering process in which the energy of the scattered particle (in this case, a phonon) changes.
- In the Raman effect, when light interacts with a crystal, it can scatter off the lattice vibrations (phonons) present in the crystal.
- The scattered light can gain or lose energy, resulting in a change in its frequency or wavelength.
- This change in frequency is known as the Raman shift, and it provides information about the vibrational modes of the crystal.
Creation or Annihilation of Phonons or Magnons:
- During the scattering process, a phonon can be created or annihilated in the crystal.
- Similarly, a magnon (a quantum of magnetic excitation) can also be created or annihilated.
- These processes contribute to the energy exchange between the incident light and the crystal lattice vibrations.
- The creation or annihilation of phonons or magnons leads to the observed Raman scattering and the resulting change in frequency or wavelength of the scattered light.
Therefore, option 'A' is correct as it accurately describes the scattering process in the Raman effect, where a phonon is scattered inelastically by a crystal with the creation or annihilation of a phonon or magnon.
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In Raman effecta)A phonan is scattered inelastically by a crystal with creation or annihilation of a phonan or magnonb)The mean free path of low enargy electron is increases in an inert gas.c)Certain transparent substance become doubly refracting when an electric field is applied at right angle to the direction of incident light.d)A phonan collide with photon and create free electronCorrect answer is option 'A'. Can you explain this answer?
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In Raman effecta)A phonan is scattered inelastically by a crystal with creation or annihilation of a phonan or magnonb)The mean free path of low enargy electron is increases in an inert gas.c)Certain transparent substance become doubly refracting when an electric field is applied at right angle to the direction of incident light.d)A phonan collide with photon and create free electronCorrect answer is option 'A'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about In Raman effecta)A phonan is scattered inelastically by a crystal with creation or annihilation of a phonan or magnonb)The mean free path of low enargy electron is increases in an inert gas.c)Certain transparent substance become doubly refracting when an electric field is applied at right angle to the direction of incident light.d)A phonan collide with photon and create free electronCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In Raman effecta)A phonan is scattered inelastically by a crystal with creation or annihilation of a phonan or magnonb)The mean free path of low enargy electron is increases in an inert gas.c)Certain transparent substance become doubly refracting when an electric field is applied at right angle to the direction of incident light.d)A phonan collide with photon and create free electronCorrect answer is option 'A'. Can you explain this answer?.
In Raman effecta)A phonan is scattered inelastically by a crystal with creation or annihilation of a phonan or magnonb)The mean free path of low enargy electron is increases in an inert gas.c)Certain transparent substance become doubly refracting when an electric field is applied at right angle to the direction of incident light.d)A phonan collide with photon and create free electronCorrect answer is option 'A'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about In Raman effecta)A phonan is scattered inelastically by a crystal with creation or annihilation of a phonan or magnonb)The mean free path of low enargy electron is increases in an inert gas.c)Certain transparent substance become doubly refracting when an electric field is applied at right angle to the direction of incident light.d)A phonan collide with photon and create free electronCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In Raman effecta)A phonan is scattered inelastically by a crystal with creation or annihilation of a phonan or magnonb)The mean free path of low enargy electron is increases in an inert gas.c)Certain transparent substance become doubly refracting when an electric field is applied at right angle to the direction of incident light.d)A phonan collide with photon and create free electronCorrect answer is option 'A'. Can you explain this answer?.
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