An object is placed 6.5 cm from a thin converging lens with a focal length of 14
ID: 2261944 • Letter: A
Question
An object is placed 6.5 cm from a thin converging lens with a focal length of 14 cm. Which one of the following statements is true concerning the image?
The image is real and 12 cm from the lens.
The image is virtual and 6.0 cm from the lens.
The image is virtual and 12 cm from the lens.
The image is real and 3.0 cm from the lens.
The image is real and 6.0 cm from the lens.
The image is real and 12 cm from the lens.
Explanation / Answer
f = 14 cm u = -6.5 cm (1/v) - (1/u) = 1/f => (1/v) - (-1/6.5) = 1/14 => v = -12.13 cm m = v/u => m = -12.13/(-6.5) = 1.866 => virtual image The image is virtual and 12 cm from the lens.