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Name the type of mirror used (i) by dent...

Name the type of mirror used (i) by dentists and (ii) in solar furnaces. Give two reasons why such mirrors are used in each case.

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(i) Concave mirrors are used by dentists to see the large images of the teeth of patients because when a toothe is within the focus of a concave mirror, then an enlarged image of the tooth is seen in the concave mirror. Thus it becomes easier to locate hte defect in the tooth.
(ii) Large concave mirrors are used in solar furnaces as reflectors. Solar furnace is placed at the focus of the concave reflector which focusses the Sun's heat rays on the furnace due to which the solar furnace gets very hot. Even steel can be melted in this solar furnace.
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