The Objective and the Eyepiece of a Refracting Astronomical Telescope

question 45

Multiple Choice

The objective and the eyepiece of a refracting astronomical telescope have focal lengths of 320 cm and 4.0 cm,respectively.The telescope is used to view Neptune and the final image is set at infinity.The diameter of Neptune is 4.96 × 10⁷ m and the distance from the earth at the time of observation is 4.4 × 10¹² m.What is the angle (in mrad) subtended by the final telescopic image of Neptune?

• A) 0.90 mrad
• B) 1.1 mrad
• C) 1.3 mrad
• D) 1.5 mrad
• E) 1.7 mrad

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Definitions:

Negative Response

A reaction or answer that indicates dissent or displeasure towards a particular stimulus or situation.

Performance Process

The method or procedure by which individuals or organizations carry out tasks and activities to achieve specific outcomes, often evaluated to improve effectiveness.

Motivation Factors

Elements or conditions that encourage individuals to act or behave in a certain way to achieve desired outcomes.

Feelings of Neutrality

Emotional states characterized by indifference or lack of strong emotions towards a situation, object, or person.