Physics Lab 1 Report (1) - Word gs Review View Tell me what you want to do .lca
ID: 1652126 • Letter: P
Question
Physics Lab 1 Report (1) - Word gs Review View Tell me what you want to do .lca 11 Normal!! No Spac." Heading 1 Heading 2 Subtitle Subtle E Paragraph Styles fit boxes and select·store latest run, from the ‘experiment' menu. Set your two filters so that the polarizing axes are at 90°. Add a third polarizing filter between the first two and repeat the entire experiment. Keep the polarizer at 0°, the analyzer at 90 and rotate the center filter beginning at 0° through 360° in 10° increments as you did before. How does this data set compare to your previous data set? What is similar and different? Does it still fit Malus' law? 28 Polarization of Light 700 500 300 -1.248 14 100 100 (85.7, 309.2) Angle )Explanation / Answer
When three polarisers are used, the angle between the first and the third being 90 deg
then for an angle theta between the first and the second polariser
we get, I = Io cos^2(theta)*cos^2(90 - theta) [ from malu's law]
I = Iocos^2(theta)sin^2(theta) = Iosin^2(2*theta)/4
so to obey the malus law, maxuimum intensity must fall by factor of 4 and the graph should be a sin^2(2theta) graph instead of cos^2(teta) graph, hence double frequency
As we can see, the graph with lesser amplitude is the graph in this case, which has double frequency too
hance this plot obeys malu's law