Definition of Planck constant
: the constant h in the Planck radiation law now found also in numerous formulas concerned with quantized energy and having a probable value of 6.626×10−27 erg second (g·cm2sec−1)
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Origin and Etymology of planck constant
after Max K. E. L. Planck †1947 German physicist
First Known Use: 1940See Words from the same year
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