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3 years ago

an object is placed at a distance of 20cm from convex lens of focal length 15cm find the image distance

Business

1 answer:

katovenus [111]3 years ago

4 0

Answer:

Image distance = 60 cm

Explanation:

Object distance from a convex lens = 20 cm

Focal length of convex lens = 15 cm

Use the following relation between the object distance, focal length and image distance.

$\frac{1}{object\,\,distance}+\frac{1}{image\,\,distance} =\frac{1}{focal\,\,length}$

$\frac{1}{20}+\frac{1}{image\,\,distance}=\frac{1}{15}\\\\ \frac{1}{image\,\,distance}= \frac{1}{15}-\frac{1}{20}\\\\ \frac{1}{image\,\,distance}= \frac{4-3}{60} \\\\ \frac{1}{image\,\,distance}=\frac{1}{60}$

Therefore,

Image distance = 60 cm

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3 years ago

an object is placed at a distance of 20cm from convex lens of focal length 15cm find the image distance​

an object is placed at a distance of 20cm from convex lens of focal length 15cm find the image distance