powercross-sectional areaeeintensity =%3DofIntensity is measured in watts per square metre (W m-2).For example, when the Sun is directly overhead, theintensity of its radiation is about 1.0kW m-2 (1 kilowatt persquare metre). This means that energy arrives at the rate ofabout 1 kW (1000 Js) on each square metre of the surfaceof the Earth. At the top of the atmosphere, the intensity ofsunlight is greater, abolit 1.37 kW m-2.QUESTION4 A 100W lamp emits electromagnetic radiation inall directions. Assuming the lamp to be a pointsource, calculate the intensity of the radiation:a at a distance of 1.0 m from the lampb ata distance of 2.0 m from the lamp.Hint: Think of the area of a sphere at each of thetwo radii.

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A 100W lamp emits electromagnetic radiation in all directions. Assuming the lamp to be a point source, calculate the intensity of the radiation: a at a distance of 1.0m from the lamp b at a distance of 2.0 m from the lamp.

A 100W lamp emits electromagnetic radiation in all directions. Assuming the lamp to be a point source, calculate the intensity of the radiation: a at a distance of 1.0m from the lamp b at a distance of 2.0 m from the lamp.

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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Question

100%

power
cross-sectional area
ee
intensity =
%3D
of
Intensity is measured in watts per square metre (W m-2).
For example, when the Sun is directly overhead, the
intensity of its radiation is about 1.0kW m-2 (1 kilowatt per
square metre). This means that energy arrives at the rate of
about 1 kW (1000 Js) on each square metre of the surface
of the Earth. At the top of the atmosphere, the intensity of
sunlight is greater, abolit 1.37 kW m-2.
QUESTION
4 A 100W lamp emits electromagnetic radiation in
all directions. Assuming the lamp to be a point
source, calculate the intensity of the radiation:
a at a distance of 1.0 m from the lamp
b ata distance of 2.0 m from the lamp.
Hint: Think of the area of a sphere at each of the
two radii.

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