I (W/m²) 800 600 400 200 · Emax (105 v²/m²) 0.00 2.00 4.00 6.00

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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Because the speed of light in vacuum (or air) has such a large value, it is very difficult to measure directly. To measure this speed, you conduct an experiment in which you measure the amplitude of the electric field in a laser beam as you change the intensity of the beam. Figure is a graph of the intensity I that you measured versus the square of the amplitude Emax of the electric field. The bestfit straight line for your data has a slope of 1.33 x 10-3 J/(V2 . s). (a) Explain why the data points plotted this way lie close to a straight line. (b) Use this graph to calculate the speed of light in air.

I (W/m²)
800
600
400
200
· Emax (105 v²/m²)
0.00
2.00 4.00
6.00
Transcribed Image Text:I (W/m²) 800 600 400 200 · Emax (105 v²/m²) 0.00 2.00 4.00 6.00
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