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4. A lens has a focal length of 2m. A pencil is placed 3m from the lens.
a. Where will the image of the pencil be formed? (show all work) (3 marks)
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b. Is the image inverted or upright? How do you know? (1 mark)

Respuesta :

onyebuchinnaji

(a) The distance of the image of the pencil from the lens is determined as 6 m.

(b) The image formed is upright, because it is magnified.

Image distance

The distance of the image formed is determined by applying lens formula as shown below;

1/f = 1/v + 1/u

1/v = 1/f - 1/u

1/v = 1/2 - 1/3

1/v = (3 - 2)/6

1/v = 1/6

v = 6 m

Magnification of the image

M = v/u

M = 6/3

M = 2

A convex lens forms an upright and magnified image.

Learn more about image distance here: https://brainly.com/question/2854969

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