1.

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.

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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