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Light Reflection and Refraction
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10/08/2021 2:13 pm
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What is the position of the image when an object is placed at a distance of 20 cm from a concave mirror of focal length 20 cm?
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10/08/2021 2:16 pm
Object distance, u = -20 cm
Focal length, f = -20 cm (concave mirror)
Image distance, v = ?
We know that
\(\frac{1}{v}\) + \(\frac{1}{u}\) = \(\frac{1}{f}\)
\(\frac{1}{v}\) + \(\frac{1}{-20}\) = \(\frac{1}{-20}\)
\(\frac{1}{v}\)= 0
∴ v = infinity