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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Organic compounds that serve as the building blocks of proteins, essential for various bodily functions.

Glutamate

An important neurotransmitter in the brain involved in learning, memory, and the regulation of the nervous system.