A ruby laser produces radiations of wavelenght 662.6 nm in pulses whose duration are 10^(-9)s .if the laser produce 0.39 J of energy per pulse, how many photons are produced in each pulse ?

A ruby laser produces radiations of wavelenght 662.6 nm in pulses whos

1.	A ruby laser produces radiations of wavelenght 662.6 nm in pulses whose duration are 10^(-9)s .if the laser produce 0.39 J of energy per pulse, how many photons are produced in each pulse ?
Answer» `1.3 XX 10^9` `1.3 xx 10^18` `1.3 xx 10^27` `3.9 xx 10^18` ANSWER :B

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A ruby laser produces radiations of wavelenght 662.6 nm in pulses whose duration are 10^(-9)s .if the laser produce 0.39 J of energy per pulse, how many photons are produced in each pulse ?

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