I learned it today – understanding length in metres

Speed of light =299792458m/s 0r approx 300000km/sec Second= 9192631770 cycles of the standard caesium 133 atom(55) transition (electron vibration pulse)- in future optical clocks because of less uncertainty  Metre= the length of the path travelled by light in a vacuum during a time interval of 1/299792458 of a second  Pm=Picometer unit of length equivalent to… Continue reading I learned it today – understanding length in metres

I learned it today- periodic table, elements and related timeline

In the modern periodic table 118 known elements got the place out of which 94 were found naturally on earth and 24 to be created in a lab. The international union of pure and applied chemistry (IUPAC) has an inter divisional committee on Nomenclature and Symbols. This committee is recognized as world authority in developing… Continue reading I learned it today- periodic table, elements and related timeline

I learned it today – Human evolution timeline

Bc-before christdom Bce- before Christian era(same as bc) Ad- Anno domini( after death) Ce- Christian era(same as Ad) Mya-million years ago Bya – Billion years ago Bp- before present (same as years ago) C. = circa (approximately) Million years of Human evolution tree c. 46 Mya- separate evolution line from Lemurs, Lorises and Galagos 37… Continue reading I learned it today – Human evolution timeline

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