A concave mirror has a focal length 50 cm . Calculate it's power
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Answer: A convex lens has a focal length of 25 cm. Calculate the distance of the object from the lens if the image is to be formed on the opposite ... on a screen (b) cannot be taken on a screen (c) can not be formed by a concave mirror (d) is not bright 3. ... The power of a lens of focal length 50 cm is: (a) 0.5D (b) -0.5D (c) 2D (d) -2D 9.
Explanation:
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