2 A mercury lamp radiates 5 W of energy uniformly in all directions in its blue spectral line (λ 435.8 nm) H.P. Mercury Spectral Lamp 100 80 60 (a) At what rate are blue photons generated in the lamp (in photons per second)? (b) Assuming the light is emitted uniformly in al40 directions, at what distance from the lamp will the rate of green photons flowing outward (the20 "intensity") be 10% photons.cm-2.s-1 (î.e. 1 million photons per square cm per second)? This is approximately the apparent brightness of a bright star. 800 600 Wavelength (nm) 400 500 700

2 A mercury lamp radiates 5 W of energy uniformly in all directions in its blue spectral line (λ 435.8 nm) H.P. Mercury Spectral Lamp 100 80 60 (a) At what rate are blue photons generated in the lamp (in photons per second)? (b) Assuming the light is emitted uniformly in al40 directions, at what distance from the lamp will the rate of green photons flowing outward (the20 "intensity") be 10% photons.cm-2.s-1 (î.e. 1 million photons per square cm per second)? This is approximately the apparent brightness of a bright star. 800 600 Wavelength (nm) 400 500 700

University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter6: Photons And Matter Waves

Section: Chapter Questions

Problem 136AP: (a) Calculate the number of photoelectrons per second that are ejected from a 1.00-mm2 area of...

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Question

Please help

2
A mercury lamp radiates 5 W of energy uniformly in
all directions in its blue spectral line (λ 435.8 nm)
H.P. Mercury Spectral Lamp
100
80
60
(a)
At what rate are blue photons generated in
the lamp (in photons per second)?
(b) Assuming the light is emitted uniformly in al40
directions, at what distance from the lamp will
the rate of green photons flowing outward (the20
"intensity") be 10% photons.cm-2.s-1 (î.e. 1
million photons per square cm per second)?
This is approximately the apparent brightness
of a bright star.
800
600
Wavelength (nm)
400
500
700

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