Define principal focus of a concave mirror. b) which mirror is preferred as drivers mirror. c) which mirror is used to concentrate sunlight to produce heat.
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Answer:
By using concave mirror in solar furnace the concentrated rays of sunlight is obtained at focus which produces enormous amount of heat because of concentration. Convex mirror is used in rear view mirror of vehicles; so that the driver can see the traffic coming from behind.
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Explanation:
Which compound are homologous
2 points
CH3-CH3, CH3-CH2-OH
CH3-CH2-CH3, CH3-CH2-CH2-CH3
CH3-CHO, CH3-CH2-CH3
CH3-CH3, CH3-CH2-COOH
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