The no of photons of light of wavelength 7000a equivalent to 1 j
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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)
= 3.5 × 10^18 photons
= 3.5 Quintillion photons
Number of photons = 3.5 Quintillion
n = Energy × λ / (hc)
= 1 J × 7000 × 10^-10 m / (6.626 × 10^-34 J s × 3 × 10^8 m/s)
= 3.5 × 10^18 photons
= 3.5 Quintillion photons
Number of photons = 3.5 Quintillion
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