Question

Where would the image be located for an object placed 20 cm, along the principal axis, from a double convex lens with a focal length of 10 cm? Is the image upright or inverted?

Answer 1

The image of an object placed 20 cm from a convex lens with a focal length of 10 cm would be located at 20 cm on the other side of the lens, and it would be inverted.

Step-by-step explanation:

For an object placed 20 cm from a double convex lens with a focal length of 10 cm, we can determine the image location using the lens formula 1/f = 1/do + 1/di, where f is the focal length, do is the object distance, and di is the image distance. Plugging in the values, we get 1/10 cm = 1/20 cm + 1/di. Solving for di, we find that the image is formed at 20 cm on the other side of the lens.

Since the object is placed at twice the focal length (f), the image formed will be real, inverted, and the same size as the object. Therefore, the image will also be inverted in orientation relative to the object.