AIIMS 2013 Physics Polarization Assertion Reason Question
Assertion: When light ray is incident at polarising angle on glass, refracted light is partially polarised. Reason: The intensity of light decreases in polarisation.
Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
Assertion is true but Reason is false.
Assertion is false but Reason is true.
Correct Answer
Detailed Explanation
A laser is a highly monochromatic and near-perfect parallel beam of light, due to which the beam can be focussed by a converging lens to a very small spot. As the intensity of the beam is too high, it can drill holes through a metal sheet even if the power is 0.2 W. But even a torch-light of 1000 W power cannot drill holes in such a metal sheet, because the light is less intense and the beam is not parallel.
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