The discovery of CV. Raman is

Options

A. Inelastic scattering of light by molecules
B. Steam engine
C. Propagation of EM Waves
D. Reflection of Ultrasonic waves

Answer

**Step-by-Step Solution:**

1. **Understanding the Context**: The question asks about the discovery made by C.V. Raman, which is a significant contribution to the field of physics.

2. **Identifying the Discovery**: C.V. Raman is best known for his discovery related to the scattering of light. This phenomenon is specifically known as the "Raman Effect."

3. **Explaining the Raman Effect**: The Raman Effect refers to the inelastic scattering of light by molecules. When light interacts with molecular vibrations, it can scatter in different wavelengths, which provides information about the molecular structure.

4. **Significance of the Discovery**: The discovery of the Raman Effect has profound implications in various fields, including chemistry and material science, as it allows for the analysis of molecular composition and structure.

5. **Conclusion**: Therefore, the discovery of C.V. Raman is the phenomenon of elastic scattering of light by molecules, which is known as the Raman Effect.

**Final Answer**: The discovery of C.V. Raman is the Raman Effect, which is the inelastic scattering of light by molecules.

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