वैज्ञानिक चेतना के वाहक चंद्रशेखर वेंकट रामन

The lesson opens by recalling Raman's voyage to Europe in 1921. While returning by ship across the Mediterranean Sea, the deep blue colour of the sea drew his attention and made him curious. He began to wonder why the sea appears blue. The accepted explanation at that time was that the sea looks blue merely because it reflects the blue colour of the sky. But Raman was not satisfied with this simple answer. This single moment of curiosity on the deck of a ship became the seed of a great scientific discovery.

The author then takes us back to Raman's early life. Chandrasekhar Venkata Raman was born on 7 November 1888 in Tiruchirapalli, Tamil Nadu, in a Tamil Brahmin family. His father, Chandrasekhar Iyer, was a teacher of mathematics and physics, so the atmosphere of learning and a love for science came to Raman as a family inheritance. Raman was an extraordinarily brilliant student from the very beginning. He passed his matriculation at a very young age and stood first in college, completing his B.A. and M.A. with distinction, winning gold medals along the way.

Despite his brilliance in physics, Raman could not immediately pursue research, because at that time there were very limited opportunities for scientific research in India. To earn a living, he appeared in the competitive examination for the Finance Department and secured the first position. He was appointed as an Assistant Accountant General and went to Kolkata (Calcutta). Thus, by profession he became an officer in the Finance Department, but the scientist within him remained alive and restless.

In Kolkata, Raman's love for science found a new path. One day he saw a signboard of the Indian Association for the Cultivation of Science (IACS). He went there and learnt that the institute had a laboratory for scientific research. From that day, Raman would go to his government office during the day and spend his mornings and evenings doing experiments in the laboratory. He worked hard at both his job and his research at the same time, showing his extraordinary dedication and self-discipline.

Raman's reputation as a researcher grew steadily. In 1917, the University of Calcutta offered him the Palit Professorship in Physics. This meant giving up a high-salaried, secure government job. It was a difficult decision, but Raman's passion for science was greater than his desire for money and comfort. He accepted the professorship at a much lower salary, choosing science over financial security. This decision reflects his single-minded devotion to science.

Now Raman could devote himself fully to research. He took up the question that had troubled him on the Mediterranean — why is the sea blue, and why is the sky blue? Through careful experiments he proved that the blue colour of the sea is not merely a reflection of the sky. The blueness arises because of the scattering of light by the water molecules of the sea itself. This deepened his interest in the scattering of light, which became the central focus of his research.

Raman's most famous discovery came on 28 February 1928. While studying how light passes through transparent materials, he discovered that when a beam of light passes through a transparent substance, a small part of the scattered light changes its wavelength and colour. This change in the nature of the scattered light came to be known as the 'Raman Effect'. It was a path-breaking discovery in the field of physics and provided scientists with a powerful tool to study the inner structure of molecules.

Because India is proud to remember this great discovery, the 28th of February is celebrated every year as 'National Science Day'. The day reminds the country of the importance of science and of the genius of an Indian scientist who made the nation proud before the whole world.

The Raman Effect brought him worldwide fame and honour. In 1930, Raman was awarded the Nobel Prize in Physics for this discovery. He became the first Asian and the first Indian to receive the Nobel Prize in the field of science. This was a moment of great pride for the whole of India, which was still under British rule. Earlier, in 1924, he had been elected a Fellow of the Royal Society of London, and in 1929 the British Government had honoured him with the title of 'Sir' (knighthood).

Raman's contribution was not limited to his own research. He was deeply committed to building scientific institutions and to encouraging young scientists in India. He served as the Director of the Indian Institute of Science (IISc) in Bengaluru and later founded the 'Raman Research Institute' there. He trained many students who themselves became eminent scientists. After independence, in 1954, the Government of India honoured him with its highest civilian award, the 'Bharat Ratna'.

Raman remained dedicated to science till his last breath. He believed that science is not merely a means of earning a living but a way of awakening curiosity, asking questions, and seeking the truth of nature. This great scientist passed away on 21 November 1970. Through his life, the author conveys that true success comes from curiosity, hard work, dedication and the courage to follow one's passion, even at the cost of personal comfort.