Question
The diagrams each show a ray of light from an object O passing through a thin converging lens.
The principal focuses in each diagram are labelled F.
Which diagrams are correct?
A 1 and 2 B 2 only C 1 and 3 D 3 only
Answer/Explanation
Ans:
C
Question
The diagrams each show a ray of light from an object O passing through a thin converging lens.
The principal focuses in each diagram are labelled F.
Which diagrams are correct?
A 1 and 2 B 2 only C 1 and 3 D 3 only
Answer/Explanation
Ans:
C
Question
A converging lens produces an image of an object $O$. The focal length of the lens is $f$.
Which position of the object produces a virtual image?
Answer/Explanation
Ans:A
Question
A thin converging lens is used to produce a sharp image of a candle. 
Various sharp images are produced on the screen by moving the lens and the screen backwards
and forwards.Which statement is always correct?
A The image is at the principal focus (focal point) of the lens.
B The image is bigger than the object.
C The image is closer to the lens than the object.
D The image is inverted.
Answer/Explanation
Ans: D
Question
An object is placed in front of a thin converging lens.
The diagram shows the paths of two rays from the top of the object.
An image of the object is formed on a screen to the right of the lens.
How does this image compare with the object?
It is larger and inverted.
It is larger and the same way up.
It is smaller and inverted.
It is smaller and the same way up.
Answer/Explanation
Ans: A