Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit
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Out of the following pairs, which one does not have identical dimension?
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Mercury is commonly used as a thermometric fluid rather than water because
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Optical fibre works on the
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Light from the star, Alpha Centauri, which is nearest to the earth after the sun, reaches the earth in
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Supersonic plane fly with the speed
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Mach number is used in connection with the speed of
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On a stationary sail boat, air is blown from a fan attached to the boat. The boat
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Rainbow is due to
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Stars which appear single to the naked eye but are double when seen through a telescope are
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