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Concave Lens and Image Formation Quiz

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Questions and Answers

What is the object distance for the concave lens with a focal length of 10cm?

20cm

10cm

40cm (correct)

5cm

What is the image distance for the concave lens with a focal length of 10cm?

10cm

5cm

20cm

8cm (correct)

What is the magnification produced by the concave lens with a focal length of 10cm?

1.5

0.5

0.25 (correct)

What is the formula to calculate the magnification produced by a lens?

The formula to calculate the magnification produced by a lens is magnification = (-) image distance / object distance. Signup and view all the answers

What is the formula to calculate the focal length of a lens?

The formula to calculate the focal length of a lens is 1/f = 1/do + 1/di, where f is the focal length, do is the object distance, and di is the image distance. Signup and view all the answers

What is the object distance for a concave lens with a focal length of 10cm, if the magnification is ¼?

The object distance for a concave lens with a focal length of 10cm, if the magnification is ¼, is 40cm. Signup and view all the answers

What is the formula to calculate the magnification produced by a lens?

Magnification (m) = -v/u, where v is the image distance and u is the object distance. Signup and view all the answers

What is the relationship between the focal length and the image distance for a concave lens?

For a concave lens, the focal length (f) and the image distance (v) are negative. Signup and view all the answers

What is the formula to calculate the object distance for a concave lens?

1/f = 1/v - 1/u, where f is the focal length, v is the image distance, and u is the object distance. Signup and view all the answers

Study Notes

Lens and Image Properties

A concave lens is used to produce an erect image.
The focal length of the concave lens is 10cm.
The magnification of the image is ¼, meaning the image is one-quarter the size of the object.

Object Properties

The object distance is not specified, but it can be calculated using the lens equation: 1/f = 1/do + 1/di, where do is the object distance and di is the image distance.

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Description

Test your knowledge of concave lenses and image formation with this quiz. Calculate the object distance for a concave lens with a focal length of 10cm and a magnification of ¼ to determine the position of the object in relation to the lens.