Which of the following statements about light focusing is not true?
A) In a healthy eye, light is focused on the retina.
B) Film should be placed at the focal plane in a camera.
C) If you try to look at an image that is not formed at the focal plane, it will be blurry.
D) The focal plane of a reflecting telescope is always located within a few inches of the primary mirror.
E) Light can be focused with a lens or a mirror.
Answer: D