A concave lens has focal length of 20 cm. At what distance from the lens a 5 cm tall object be placed so that it forms an image at 15 cm from the lens? Also calculate the size of the image formed.

Light Reflection and Refraction

Last Post by Kinjal ray 5 years ago

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01/12/2020 5:08 pm

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Tulika pia

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A concave lens has focal length of 20 cm. At what distance from the lens a 5 cm tall object be placed so that it forms an image at 15 cm from the lens? Also calculate the size of the image formed.

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01/12/2020 5:10 pm

Kinjal ray

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f = -20 cm, ho = 5 cm, v = -15 cm

2s.png

Image is diminished and virtual.

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A concave lens has focal length of 20 cm. At what distance from the lens a 5 cm tall object be placed so that it forms an image at 15 cm from the lens? Also calculate the size of the image formed.

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