How Is Spherical Aberration Eliminated in a Reflecting Telescope

question 79

Multiple Choice

How is spherical aberration eliminated in a reflecting telescope?

• A) by using the Cassegrain focus of the telescope
• B) by making the primary mirror very thin
• C) by grinding the primary mirror surface to a parabolic shape
• D) by bending the photographic film into a concave shape

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Definitions:

Cyclopentane

A cyclic hydrocarbon with the formula C5H10, consisting of a ring of five carbon atoms each bonded with two hydrogen atoms.

Organic Product

A compound resulting from organic reactions, primarily consisting of carbon atoms along with hydrogen, oxygen, nitrogen, and other elements.

Alkene Product

A type of hydrocarbon containing at least one carbon-carbon double bond, formed as the result of certain organic reactions.

2-Chloro-2-methylpentane

An organic compound with the molecular formula C6H13Cl, characterized by a chlorine atom attached to the second carbon of a methylpentane chain.