A lemon kept in water in a glass tumbler appears to be bigger than its actual size when viewed from the sides. This is because of
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What is the unit of calorific value?
Instrument for measuring low temperatures is called
Which one among the following components can not be developed within an "integrated circuit"?
Warm air is ______.
Through which does light travel best?
Which of the following is NOT an application of Fiber optics?
In an optical fibre the signal is transmitted