A beam of natural light falls on a system of 5 polaroids, which are arranged in succession such that the pass axis of each polaroid is turned through |
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A beam of natural light falls on a system of 5 polaroids, which are arranged in succession such that the pass axis of each polaroid is turned through |
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a) |
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b) |
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c) |
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d) |
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(d) Let Then the intensity of light from the Intensity of light from the 2nd polaroid is Intensity of light from the 3rd polaroid is Intensity of light from the 4th polaroid is Intensity of light from the 5th polaroid is Therefore, the fraction of the incident light that passes through the system is |
The figure here gives the electric field of an EM wave at a certain point and a certain instant. The wave is transporting energy in the negative direction. What is the direction of the magnetic field of the wave at that point and instant
a) |
Towards + |
b) |
Towards |
c) |
Towards + |
d) |
Towards |
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