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[" e "23:" The eye can detect "5times10^...

[" e "23:" The eye can detect "5times10^(4)" photons per square metre per second of green light "(lambda=5000A)" while "],[" the ear can detect "10^(-13)(W/m^(2))" .Find the factor by which the eye is more sensitive as a powe "],[" detector than the ear."]

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