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Light Reflection and Refraction
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10/08/2021 2:28 pm
Topic starter
Write down a formula for the magnification produced by a concave mirror.
(a) in terms of height of object and height of image
(b) in terms of object distance and image distance
1 Answer
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10/08/2021 2:31 pm
Here, u = -20 cm; f = -10 cm
\(\frac{1}{v}\) + \(\frac{1}{u}\) = \(\frac{1}{f}\)
\(\frac{1}{v}\) + \(\frac{1}{-20}\) = \(\frac{1}{-10}\)
\(\frac{1}{v}\) = \(\frac{1}{20}\) - \(\frac{1}{10}\) = -\(\frac{1}{20}\)
∴ v = -20
So, image will be real and inverted