ਖਣਿਜ ਲੂਣ ਕਿਹੜੇ ਭੋਜਨ ਪਦਾਰਥਾ ਤੋਂ ਮਿਲਦੇ ਹਨ
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temperature(K) lamda=590*10**-9; # wavelength of sodium D line(m) ... ratio between stimulated emission and spontaneous emission is 5.3298 *10**- 21 ...
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first answer is too wrong
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