C.V. Raman
Why in news?
Every year 28th February is observed as National Science Day (NSD) in India to honor Sir Chandrasekhara Venkata (CV) Raman’s discovery of the Raman Effect in 1928.
Relevance:
GS-03 (Science and technology)
About C V Raman:
- CV Raman was born on 7th November 1888, in Tiruchirappalli, Tamil Nadu.
- He graduated from Presidency College, Madras.
- He contributed significantly in the field of atomic physics and optics. Eventually, he founded the Raman Research Institute (1948), Indian Journal of Physics (1926), and Indian Academy of Sciences (1934).
- His major contribution was the discovery of the Raman Effect.
What is the Raman effect?
- It is a phenomenon where the incoming light interacts with a sample material, the result of which leads to a shift in its wavelength due to molecular vibrations.
- This scattered light provides unique spectral information and is also known as Raman scattering.
- Significance:
- It is used in laser technology and in forensics to detect drugs in sealed evidence bags.
- Raman spectroscopy is also used in cancer diagnosis.
Prelims question:
Consider the following statements regarding the Raman Effect:
- It involves the change in wavelength of light due to molecular vibrations.
- It forms the basis of Raman spectroscopy, which is used for material analysis.
- The phenomenon was first observed after the invention of lasers in the 1960s.
Which of the statements given above is/are correct?
(a) 1 and 2 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2, and 3
Answer: (a) 1 and 2 only
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