a concave lens has focal length of20 cm.at what distance the lens a 5cm tall object be placed so that it forms an image at 15cm from the lens? also calculate the size of the image formed.?
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Answer:
Use magnification formula
Explanation:
As it is a concave lens,focal length will be
negative 20 cm
height is 5 cm
image is positive 15 cm
then use the formula and try
don't forget to say ur answer
Hope it helps!
@alima04!
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