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Q. Lens is made up of
A lens is a transmissive optical device that focuses or disperses a light beam by the process of refraction.
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Q. When temperature is gradually decreased the specific heat of substance is
Q. Which of the following is used as a moderator in nuclear reactor?
Q. Who among the following coined the term ―cosmic rays‖ ?
Q. Good conductor of electricity is
Q. Permissible noise level at Residential area during night time is:
Q. Rainbow is seen after rain as of hanging molecules of water which act as
Q. An egg sinks in soft water but floats in a concentrated solution of salt because
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