The number of photons of light of wavelength 7000 angstrong equivalent to one joule are
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Energy = n × hc/λ
n = Energy × λ / (hc)
= 1 J × 7000 × 10^-10 m / (6.626 × 10^-34 J s × 3 × 10^8 m/s)
n = Energy × λ / (hc)
= 1 J × 7000 × 10^-10 m / (6.626 × 10^-34 J s × 3 × 10^8 m/s)
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