an object is placed 40 cm in front of mirror of focal length 20cm . find position of image .
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Answer:
Use mirror formula
\frac{1}{u} + \frac{1}{v} = \frac{1}{f}
\frac{-1}{40} + \frac{1}{v} = \frac{-1}{20}
v = - 40 cm \quad [\text{In front of concave mirror}]
Nature - Real and inverted
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plz. tell which mirror
concave or convex
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