The Light-Gathering Power of a Telescope Is Directly Proportional to

question 40

Multiple Choice

The light-gathering power of a telescope is directly proportional to

• A)the diameter of the primary mirror or lens.
• B)the focal length of the primary mirror or lens.
• C)the ratio of the focal lengths of its primary mirror or lens and its eyepiece.
• D)the length of the telescope tube.
• E)the diameter of the eyepiece.

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