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Light Reflection and Refraction
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13/08/2021 1:03 pm
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An object is placed at a distance of 10 cm from a convex mirror of focal length 5 cm.
Draw a ray diagram showing the formation of image. State two characteristics of the image formed. Calculate the distance of the image from mirror.
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13/08/2021 1:08 pm
(ii) The image formed is diminished and erect.
(iii) u = -10 cm, f = 5 cm
\(\frac{1}{v}\) + \(\frac{1}{u}\) = \(\frac{1}{f}\)
⇒ \(\frac{1}{v}\) + \(\frac{1}{-10}\) = \(\frac{1}{5}\)
⇒ \(\frac{1}{v}\) = \(\frac{1}{10}\) + \(\frac{1}{5}\) = \(\frac{3}{10}\)
∴ v = \(\frac{10}{3}\)cm = 3.33 cm