Vikram Sarabhai is widely regarded as the 'Father of the Indian Space Program' for his pioneering role in establishing the Indian Space Research Organisation (ISRO) and leading India's space exploration efforts.

C. V. Raman was awarded the Nobel Prize in Physics in 1930 for his discovery of the 'Raman Effect', which involves the inelastic scattering of light by molecules.

Homi J. Bhabha is renowned for his contributions to nuclear physics and his leadership in establishing India's atomic energy program. He founded the Tata Institute of Fundamental Research (TIFR) and played a crucial role in the development of India's nuclear capabilities.

Srinivasa Ramanujan was a brilliant Indian mathematician who made significant contributions to number theory and other areas of mathematics. He is known for his discovery of Ramanujan's prime number formula and his work on modular forms.

Jagadish Chandra Bose was a renowned Indian scientist who made significant contributions to the field of radio communication. He conducted pioneering experiments in wireless telegraphy and demonstrated the transmission of radio waves over short distances.

Satyendra Nath Bose was an Indian physicist who made significant contributions to particle physics. He is known for his work on the Bose-Einstein statistics and the prediction of the existence of the Higgs boson, which was later confirmed by the Large Hadron Collider at CERN.

Subrahmanyan Chandrasekhar was an Indian-American astrophysicist who made significant contributions to the field of astrophysics. He is known for his work on stellar evolution, black holes, and the Chandrasekhar limit, which determines the maximum mass of a white dwarf star.

Lalji Singh is an Indian scientist known for his contributions to the field of genetics and his pioneering work on DNA fingerprinting. He developed a technique for DNA fingerprinting that is widely used in forensic science, paternity testing, and other applications.

Raj Reddy is an Indian-American computer scientist known for his contributions to the field of artificial intelligence. He is a pioneer in the field of robotics and has made significant contributions to natural language processing, speech recognition, and computer vision.

R. K. Pachauri was an Indian environmental scientist and economist known for his contributions to the field of climate change. He served as the Chairman of the Intergovernmental Panel on Climate Change (IPCC) from 2002 to 2015 and played a significant role in raising awareness about the impacts of climate change.

C. N. R. Rao is an Indian chemist and materials scientist known for his contributions to the field of materials science. He is a pioneer in the study of graphene and has made significant contributions to the development of new materials and technologies.

M. S. Swaminathan is an Indian geneticist and agricultural scientist known for his contributions to the field of biotechnology. He is a pioneer in the development of high-yielding varieties of crops and has played a significant role in the Green Revolution in India.

K. Radhakrishnan is an Indian space scientist known for his contributions to the field of space science. He served as the Chairman of the Indian Space Research Organisation (ISRO) from 2009 to 2014 and played a key role in the successful launch of the Chandrayaan mission, India's first lunar exploration mission.

P. N. Tandon is an Indian nuclear medicine physician and scientist known for his contributions to the field of nuclear medicine. He is a pioneer in the development of radiopharmaceuticals and has played a significant role in the advancement of nuclear medicine in India.