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.

Question

Quizplus · Accepted Answer

The statement "The focal plane of a reflecting telescope is always located within a few inches of the primary mirror." is not true. In a reflecting telescope, the focal plane can be located in different positions depending on the design of the telescope. It is not necessarily always located within a few inches of the primary mirror.

Which of the Following Statements About Light Focusing Is Not