A small telescope has an objective of focal length 140 cm and an eyepiece of focal length 5.0 cm. The magnifying power for a normal adjustment is:
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Question

A small telescope has an objective of focal length 140 cm and an eyepiece of focal length 5.0 cm. The magnifying power for a normal adjustment is:

G1 Physics · Accepted Answer

Step 1: An astronomical telescope in normal adjustment has angular magnification magnitude M = fₒ/fₑ. Step 2: M = 140/5.0 = 28. Final answer: (A) 28 (image inverted).