Polarizing sunglasses are useful because they are able to
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Which of the following cannot be used for making lenses?
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The energy obtained from atoms is known as.........
Density of water is maximum at ______.
A ball rolling along the ground gradually slows down and finally comes to rest is due to ________.
When ice floats on water, its _____ part remains outside the water.
Instrument for measuring rainfall is called
Weight of a body is maximum at the: