Answer to Question #88780 in Optics for Navdha

Question #88780

Calculate the magnitude of the faintest object that can be detected by an optical
telescope of diameter 5.0 m.

Expert's answer

For this problem we can use formula

"m=2+5lg(D)"

D - diameter telescope in millimeters; m - magnitude

Calculating

"m=2+5lg(5000)=20.5"

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