IB Physics: Solutions

1. A parallel beam of unpolarised light is transmitted through the polarisers shown below. The laser has a power of 2mW and the diameter of the beam is 4mm. Calculate the Intensity of the beam a. at A b. B c. at B if 2 is rotated through 45° d. at B if 3 is now rotated through 90° e. at B if 2 is now removed. Solution

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