An object is placed 50 cm from a converging lens of focal length 30 cm . The image produced would be
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An object is placed 50 cm from a converging lens of focal length 30 cm . The image produced would be
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Answer:
Let an image be formed at the screen when the lens is at a distance of x from object. Then applying Lens equation gives,
50−x1−−x1=f1
x2−50x+50f=0
Solution for this quadratic equation is,
x1=250+D and x2=250−D
As given, x1−x2=50
Hence D=502−200f=30
f=8cm
Answer:
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