Today, October 23, 2026, holds significance for various reasons. While it marks the auspicious occasion of Pradosh Vrat (Shukla) and the death anniversaries of notable personalities like Arvind Inamdar and Bhagwat Jha Azad, it also reminds us of global events like the devastating earthquake in Turkey and the Moscow Theater hostage crisis, alongside technological milestones like Apple's launch of the first iPod. However, in the annals of Indian science, October 23 holds a special place. It was on this very day in 1915 that a pivotal chapter began in the life of a prodigious scientist who would elevate Indian science to a global stage: Sir C.V. Raman's appointment as Professor at Calcutta University.
The name Sir C.V. Raman immediately brings to mind the Raman Effect and the Nobel Prize. But how did this journey unfold? How did a boy from a modest background become a world-renowned scientist? How did his appointment at Calcutta University shape his scientific career? Let's delve into his inspiring journey today.
A New Dawn for Indian Science: The Calcutta Appointment
October 23, 1915, was more than just a date on the calendar; it was a golden letter day in the history of Indian science. On this day, Sir Chandrasekhara Venkata Raman, whom we respectfully know as Sir C.V. Raman, was appointed as the 'Palit' Professor of Physics at Calcutta University. This appointment was not merely for an individual; it heralded a new era of world-class research originating from Indian soil. At the time, Raman held a high-ranking position in the Indian Finance Department, enjoying a substantial salary and social prestige. Yet, his profound passion for science compelled him to seek more.
Sir Ashutosh Mookerjee, the then Vice-Chancellor of Calcutta University, was a visionary educationist. He recognized the brilliant scientist within Raman and extended an invitation for him to join the university. Raman made the courageous decision to leave his secure government job, accepting a lower salary to pursue his true calling. This decision proved to be a watershed moment in his life and for Indian science.
At the Department of Physics, Calcutta University, he immersed himself completely in research. Here, he found the environment and freedom essential for scientific inquiry. His work primarily focused on the study of light and sound. His appointment not only provided Indian students with an exceptional teacher but also a globally recognized researcher as a mentor.
From Prodigy to Pioneer: Raman's Early Life and Education
Sir C.V. Raman was born on November 7, 1888, in Tiruvanaikoil, Tiruchirappalli district, in what is now Tamil Nadu. His father, Chandrasekhara Iyer, was a professor of physics and mathematics, and his mother, Parvati Ammal, was a well-educated homemaker. From a young age, Raman displayed a keen interest in science and learning. His father often performed science experiments at home, which ignited Raman's curiosity.
He completed his primary education at St. Aloysius Anglo-Indian High School in Visakhapatnam. He matriculated at the age of 11 and passed his intermediate examination with distinction at 13, showcasing his extraordinary intellect. He then enrolled at Presidency College in Madras (now Chennai). In 1904, at the tender age of 16, he earned his B.A. degree with distinction, graduating first in his class from Madras University and receiving a gold medal. In 1907, he completed his M.A. degree in Physics, again with first-class honors. His M.A. thesis was titled 'Asymmetrical Diffraction Bands Due to a Rectangular Aperture.' His academic achievements at such a young age were truly remarkable.
The Call of Science: A Transformative Shift
After completing his education, Raman joined the Indian Finance Department as an Assistant Accountant General. While this job provided financial stability, his mind constantly yearned to explore the mysteries of science. After work, he would dedicate his time to research at the Indian Association for the Cultivation of Science (IACS) laboratory. It was here that his scientific journey truly began to take shape.
Even while in government service, Raman never abandoned his commitment to science. At IACS, with the modest equipment available, he conducted significant research in acoustics and optics. Many of his research papers gained international acclaim. Sir Ashutosh Mookerjee took notice of his research and offered Raman the 'Palit' Professorship of Physics at Calcutta University. This was a highly prestigious position, and the university promised Raman complete freedom for his research. Raman's decision to forgo a secure, high-paying government job for a lower-paying position in his field of passion is a testament to his scientific integrity and courage.
“Science is not just about experiments in a lab or theories in books; it is an art of observing the world around us and unraveling its mysteries.” – Sir C.V. Raman
Unveiling the Raman Effect: A Revolution in Light Scattering
Upon joining Calcutta University, Raman intensified his research on light scattering. The mystery of the blue color of the sea had always fascinated him. During his travels, he observed the blue hue of the Mediterranean Sea and felt that its color was not solely due to the reflection of the sky or Rayleigh scattering by water molecules. He believed there was a deeper scientific secret at play.
Driven by this curiosity, he began experiments on light scattering in his laboratory, joined by his students and colleagues. On February 28, 1928, Raman and his students observed an extraordinary phenomenon. When light passes through a transparent substance (e.g., liquid or gas), a small fraction of the scattered light changes its wavelength. This means the color of the light changes. This phenomenon came to be known as the 'Raman Effect'.
The Scientific Explanation of the Raman Effect
Normally, when light passes through a transparent medium, photons (light particles) are scattered by the atoms or molecules of the medium. This is called 'Rayleigh scattering,' where the wavelength of light does not change. However, Raman observed that some photons of light either transfer energy to the molecules in the medium or gain energy from them. This energy exchange causes a change in the light's wavelength – some photons increase in wavelength (Stokes lines), while others decrease (anti-Stokes lines). These changes in wavelength depend on the vibrational and rotational energy levels of the molecules in that medium.
In simpler terms, the Raman Effect creates a unique 'light fingerprint' for each substance. This fingerprint provides crucial information about the molecular structure of that substance. Just as we identify individuals by their fingerprints, the light fingerprint generated by the Raman Effect allows us to identify the chemical composition of a substance.
The announcement of the discovery of the Raman Effect was made on February 28, 1928. Recognizing the significance of this day, the Government of India declared February 28 as 'National Science Day' in 1986. This day promotes scientific endeavors in India and attracts students towards science.
Global Acclaim and the Nobel Laureate
The discovery of the Raman Effect was a revolutionary breakthrough in science, opening new avenues in both physics and chemistry. In 1930, Sir C.V. Raman was awarded the Nobel Prize in Physics 'for his work on the scattering of light and for the discovery of the effect named after him.' He was the first Indian and the first Asian scientist to win a Nobel Prize. This was a moment of immense pride not only for him but for the entire nation.
Following the Nobel Prize, his fame spread globally. He received numerous honorary degrees and accolades from various universities. In 1929, he was conferred the 'Knight Bachelor' title, which granted him the prefix 'Sir.' In 1954, the Government of India honored him with the 'Bharat Ratna,' the highest civilian award. All these honors were global recognitions of his unparalleled scientific contributions.
The Enduring Legacy of the Raman Effect
The discovery of the Raman Effect was not just a scientific finding; it became the foundation for many new technologies and research fields. Today, Raman Spectroscopy is used as a powerful analytical tool in diverse areas such as chemistry, physics, biology, pharmaceuticals, and materials science.
- Chemistry: For identifying the structure and purity of chemical compounds.
- Medical Field: For cancer diagnosis, drug analysis, and examination of biological samples.
- Forensic Science: For identifying samples in criminal investigations.
- Environmental Science: For monitoring pollution and water quality.
- Nanotechnology: For studying the properties of nano-materials.
Raman's life journey is a source of inspiration for every student. His dedication to science, curiosity, hard work, and determination to conduct research even under challenging circumstances teach us invaluable lessons. Leaving a government job to pursue his passion for science, conducting world-class research with simple equipment, and winning a Nobel Prize while remaining in his home country are all testaments to his indomitable will.
Did You Know?
- Sir C.V. Raman published his first scientific research paper at the young age of 18.
- When he went to Sweden to accept the Nobel Prize, he wore traditional Indian attire (a turban), expressing his pride in his culture to the world.
- Raman became the first Indian Director of the 'Indian Institute of Science' (IISc) in Bengaluru in 1934.
- He founded the 'Raman Research Institute' in 1948, where he spent the last years of his life dedicated to research and mentorship.
- Under his guidance, many Indian scientists made significant contributions, including Dr. K.S. Krishnan, who was his key collaborator in the discovery of the Raman Effect.
Conclusion
Sir C.V. Raman's appointment at Calcutta University on October 23, 1915, was not merely an event in a scientist's career; it was a significant milestone in the history of Indian science. His decision provided him with the opportunity to unravel the mysteries of light, bestowing upon the world the invaluable scientific treasure known as the 'Raman Effect.' His life symbolizes determination, curiosity, and arduous labor. He demonstrated that with the right opportunity and a fervent passion for research, world-class scientific discoveries can be made even from within India. Today, let us salute Raman's contributions and draw inspiration from him to continue on the path of science, for science is the key to our future!