Tell me how we are getting light from electrical bulb?
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Why does a barometer read higher at Bombay than at Simla ?
Explain the Optical Medium ?
Why us the height of mercury column unaffected by the difference in the value of gravity at the same place?
What is Convex lens ?
moment of inertia of an area is always least with respect to
What is Soda lime ?
What is speed of sound at sea level?
Which property of sound is affected by change in air temperature?
Draw a graph between frequency of photon and velocity of photo electron?
What seven colors appear to be white when mixed together?
What is Electromagnet?
Why are the tides produced in the sea ?