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Q. 'Mirage' is an example of
'Mirage' is an example of refraction and total internal reflection of light.
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Q. A man presses more weight on earth at :
Q. Why does water tank appear shallower when viewed from the top?
Q. What frequency range is the high frequency band?
Q. It is easier to roll a barrel full of coal tar than to pull it because
Q. When a light wave is reflected from a mirror, there is a change in its
Q. The velocity of sound in moist air is more than in dry air because the moist air has
Q. Water is not suitable as a calorimetric substance because it :
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