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Find the energy of each of photon which ...

Find the energy of each of photon which correspond to light of frequency 3*(10)-15.

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E = hv (According to Planck.s quantum equation )
`E = 6.6 xx 10 ^(-4) Js xx 10 ^(15) s ^(-1)`
`= 19.8 xx 10 ^(-19)J or 1. 98 xx 10 ^(-18) J`
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