A 40 W incandescent bulb radiates from a tungsten filament operating at 3300 K. Assuming that the

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A 40 W incandescent bulb radiates from a tungsten filament operating at 3300 K. Assuming that the bulb radiates like a blackbody,

(a) what are the frequency f_m and the wavelength λ_m at the maximum of the spectral distribution?

(b) If f_m is a good approximation of the average frequency of the photons emitted by the bulb, about how many photons is the bulb radiating per second?

(c) If you are looking at the bulb from 5 m away, how many photons enter your eye per second? (The diameter of your pupil is about 5.0 mm.)

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Modern Physics

ISBN: 9781429250788

6th Edition

Authors: Paul A. Tipler, Ralph Llewellyn

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Question Posted: Feb 03, 2023 04:57 AM

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A 40 W incandescent bulb radiates from a tungsten filament operating at 3300 K. Assuming that the

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a b Each photon has average energy E hf and NE 40J s c At 5m from the lamp N ph...View the full answer

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