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A concave lens of focal length …

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A concave lens of focal length 60 cm is used to form an image of an object of length 9cm kept at a distance of 30 cm from it .use lens formula to determine the nature , position and length of image formed.

Posted by Asmita Belapurkar 5 years, 2 months ago

CBSE > Class 10 > Science

1 answers

A K47 5 years, 2 months ago

1/f=1/v - 1/u 1/v=1/f + 1/u In concave lens the object and image distance is always negative then 1/v = -1/60+(-1)/30 =-3/60 so 1/v = -1/20 therefore v is -20cm. The image is virtual and erect. The size of the image is diminished.

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