A telescope has lenses with focal lengths 1000mm and 40mm. What is its magnification?
Friday, April 1st, 2011 at
9:15 pm
When viewed with the unaided eye the moon subtends an angle of 0.5 degrees. What angle would it subtend when viewed through the telescope?
US $125.02
Magnification m= -fo/fe where fo >fe
Magnification m= -1000/40 = 25
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The angle subtended when viewed through the telescope is 0.5*25 = 6.25ยบ
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