Q. The lens which is thick at the center but thin at the edges is called

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Q. Any transparent material having two surfaces of which at least one is curved is called

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Q. The focal point is also termed as

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Q. The lens which causes incident parallel rays of light to diverge at a point is called

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Q. The distance between the optical center and the focal point is called

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Q. Light rays are brought to focus at a point in

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Q. The rays passing through the optical center are

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Q. The point at which all rays parallel to the principal axis converge to after refraction by the lens is called

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Q. The horizontal line passing symmetrically through the optical center of the lens is known as

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Q. The lens which is thin at the center but thick at the edges is called

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Q. The plane which passes through focal point and principal axis is known as

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Q. The types of lenses are

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Q. The lens which causes incident parallel rays to converge at a point is called

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Q. The midway point between the lens surfaces on its principal axis is known as

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Q. The mass of the jar containing air is 320 g, mass of evacuated jar is 305 g, mass of jar with water is 1090 g and density of water is 1 g cm⁻³. What mass of water was nodded to fill the jar?

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Q. The mass of the jar containing air is 320 g, mass of evacuated jar is 305 g, mass of jar with water is 1090 g and density of water is 1 g cm⁻³. What is the density of the air?

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Q. The mass of the jar containing air is 320 g, mass of evacuated jar is 305 g, mass of jar with water is 1090 g and density of water is 1 g cm⁻³. What mass of air filled the bottle?

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Q. The SI unit of density is

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Q. The density of pure gold is

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Q. The mass per unit volume is called the substance's

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