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
2
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

Flashcards

Object Distance

The distance between the lens and the object.

Image Distance

The distance between the lens and the image.

Magnification

The ratio of the image height to the object height, indicating how much the image is magnified or reduced.

Focal Length (concave lens)

The distance between the lens and the point where parallel rays of light converge after passing through the lens. It is always negative for a concave lens.