A light beam of wavelength 596 hm and intensity 251 W/m^2 shines on a target of area 2.47 m^2 for a duration of 3.57 s. How many photons from the light beam will have struck the target during this time? 9.30E+21

A light beam of wavelength 596 hm and intensity 251 W/m^2 shines on a target of area 2.47 m^2 for a duration of 3.57 s. How many photons from the light beam will have struck the target during this time? 9.30E+21

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Compton effect

The incoming photons' energy must be in the range of an X-ray frequency to generate the Compton effect. The electron does not lose enough energy that reduces the wavelength of scattered photons towards the visible spectrum. As a result, with visible lights, the Compton effect is missing.

Recoil Velocity

The amount of backward thrust or force experienced by a person when he/she shoots a gun in the forward direction is called recoil velocity. This phenomenon always follows the law of conservation of linear momentum.

Question

A light beam of wavelength 596 nm
and intensity 251 W/m^2 shines on
a target of area 2.47 m^2 for a
duration of 3.57 s. How many
photons from the light beam will
have struck the target during this
time?
9.30E+21
1.06E+22
6.64E+21
4.65E+21

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