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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. Name the process of production of energy in the Sun
Q. The device used for measuring the wavelength of X-rays is
Q. Which of the following electromagnetic radiations has the smallestwavelength ?
Q. The ''Greenhouse effect' is mainly due to increase in atmospheric
Q. Which of the following produces Electromagnetic waves?
Q. Which among the following denotes the correct usage of an instrument called ―Theodolite‖?
Q. The time period of a pendulum depends on
Q. In an inelastic collision, state which of the following statements is true:
Q. The distance between node and adjacent antinode is 30 cm. The wavelength is
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