<nis:link nis:type=tag nis:id=OnThisDay nis:value=OnThisDay nis:enabled=true nis:link/> : Feb 28th is celebrated as the <nis:link nis:type=tag nis:id=NationalScienceDay nis:value=NationalScienceDay nis:enabled=true nis:link/> to mark the discovery of the <nis:link nis:type=tag nis:id=RamanEffect nis:value=RamanEffect nis:enabled=true nis:link/> by Indian physicist and Nobel Laureate Sir <nis:link nis:type=tag nis:id=CVRaman nis:value=CVRaman nis:enabled=true nis:link/> in 1928.