C.V. RAMAN - Nov 21 - Death Anniversary Bharat Ratna (1954) Nobel Laureate in Physics (1930) He discovered that when light traverses a transparent material, some of the deflected light changes in wavelength. This phenomenon is now called Raman scattering and is the result of the Raman effect.
ALBERT EINSTEIN A Great Scientist On Nov 21, 1905, he published his paper "Does the Inertia of a Body Depend Upon Its Energy Content?" It revealed the relationship between energy and mass and led to the mass-energy equivalence formula E = mc².
SACHIN TENDULKAR BHARAT RATNA November 21, 2000 He scored his 23rd test century (122 runs) at New Delhi, India, against Zimbabwe     In all Sachin made 100 centuries in his cricketing career; 51 in test matches and 49 in ODIs
AJMAL KASAB (The Pakistani Dreaded Terrorist) Nov-21 - His Execution Anniversary Kasab was sentenced to death for attacking Mumbai and killing 166 people on 26 November 2008 along with nine orher Pakistani terrorists. He was found guilty of 80 offences, including waging war against the nation, which is punishable by the death penalty. He was hanged till death on 21 November 2012 at 7:30 A.M.