If a 110-W lightbulb emits 3.5 % of the input energy as visible light (average wavelength 550 nm) uniformly in all direc

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If A 110 W Lightbulb Emits 3 5 Of The Input Energy As Visible Light Average Wavelength 550 Nm Uniformly In All Direc 1 (43.66 KiB) Viewed 14 times

If a 110-W lightbulb emits 3.5 % of the input energy as visible light (average wavelength 550 nm) uniformly in all directions. Part A How many photons per second of visible light will strike the pupil (4.0 mm diameter) of the eye of an observer 2.5 m away? Express your answer using two significant figures. Π| ΑΣΦ AN₁ At Submit Part B Request Answer AN₂ At ? How many photons per second of visible light will strike the pupil (4.0 mm diameter) of the eye of an observer 1.5 km away? Express your answer using two significant figures. 1ΨΕΙ ΑΣΦ photons/s ? photons/s