Where will the image be formed for the object placed in front of the convex lens in the figure? A convex lens stands on a horizontal principal axis, with F₁ and 2F₁ marked on the left of the lens and F₂ and 2F₂ on the right. An upright object arrow stands between F₁ and 2F₁.

Where will the image be formed for the object…

Where will the image be formed for the object placed in front of the convex lens in the figure?

Question 28

MediumOriginal question

Where will the image be formed for the object placed in front of the convex lens in the figure?

Between F₂ and 2F₂Correct answerYour answerAt F₂Correct answerYour answerBeyond 2F₂, on the other side of the lensCorrect answerYour answerBetween F₁ and the lens, on the object's sideCorrect answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer C

Correct answer: C

The object is between F₁ and 2F₁.
Then the image is real, inverted and magnified, and forms beyond 2F₂. A slide projector uses this arrangement.

Worth noting

Between F₂ and 2F₂ is the image position for an object beyond 2F₁; the two cases swap.

Concept: Image by a convex lens: object between F and 2F
Typical timeTypical: 60 s
Your timeYours: —

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Ten questions from Everyday Physics, at your own pace.

Practise this chapter →

Ten questions from Everyday Physics, at your own pace.

Where will the image be formed for the object placed in front of the convex lens in the figure?

Question 28

Explanation