why concave mirror is used in searchlights, headlights, solarfurnace, dentist mirror, and in astronomical telescope? why can't we use convex mirror in these tools?
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Headlights of car: Type of mirror used is concave as the light of lamp undergoes divergence from reflector surface and cover large area in the front.
b) Solar/rear view of vehicle: It is a convex mirror as it gives diminished, virtual and an erect image of the side or rear with wider field of view. A convex mirror enables driver to view much larger area than would be possible with a plane mirror.
c) Solar Furnace: It is a concave mirror. As sun rays after reflection from its surface, get converged at focus with much intense heat.
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