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Give reasons:(1) You cannot enjoy watching a movie from a very short distance from the screen in a cinema hall.(2) A simple microscope is used by watch repairers.(3) A concave lens is used to correct myopia.(4) In gold age bifocal lens is necessary for some person.(5) Concave mirrors are used in solar devices. |
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Answer» Give reasons: (1) You cannot enjoy watching a movie from a very short distance from the screen in a cinema hall. (2) A simple microscope is used by watch repairers. (3) A concave lens is used to correct myopia. (4) In gold age bifocal lens is necessary for some person. (5) Concave mirrors are used in solar devices. |
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