An Astronomical Telescope Has an Objective of Diameter 20 Cm

question 16

Multiple Choice

An astronomical telescope has an objective of diameter 20 cm with a focal length of 180 cm. The telescope is used with an eyepiece of focal length 3.0 cm. The magnifying power of the telescope is

• A)360 X.
• B)60 X.
• C)540 X.
• D)7 X.
• E)180 X.

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Definitions:

Conversion Formulas

Mathematical equations used for converting units from one system to another, e.g., from metric to imperial.

Conversion Formula

A mathematical formula used to change a measurement from one unit to another.

Milligrams

A unit of mass equal to one thousandth of a gram, commonly used to measure small quantities of substance.

Grams

A metric unit of weight equivalent to one thousandth of a kilogram, widely used in science and everyday commerce.