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प्रश्न
Name the spherical mirror which has:
(a) virtual principal focus.
(b) real principal focus.
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उत्तर
The spherical mirror which has
(a) a virtual principal focus is a convex mirror
(b) a real principal focus is a concave mirror
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संबंधित प्रश्न
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For measuring the angle of incidence, he must position the protractor in the manner shown in the figure:
