Question

18. In Raman spectrum, if I is the
wavelength of incident radiation, then
the Stoke's lines will have wavelength
equal to
O a)
Ο b)λ+ Δλ
Ο c)λ - Δλ
O d) 212​

Answer 1

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Answer 2

Answer:

The correct answer is option (3)

In Raman spectrum, if I is the wavelength of incident radiation, then

the Stoke's lines will have wavelength equal to λ - Δλ

Explanation:

By the molecules present in the medium the light gets scattered. This is known as Raman effect.

• Due to difference in wavelength the light gets scattered when it enters in to the medium.
• The light scattering at lower frequency is known as stokes's lines and the light scattering at higher frequency is known as anti-stokes lines.
• From the higher vibrational state the molecules will come back to the original state.

• hv-ΔE is the energy left by photon from higher to lower energy level.
• When compared to antistoke line the stokes line is more intense because the atoms in the ground state is more than that of excited state.

Stokes lines = λ - Δλ

Anti-stokes lines = λ+ Δλ

λ = wavelength

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