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    Are "Magnifying power" and "Angular Magnification" the same thing?

    Because I have 2 formulas:

    Magnifiying Power = 1/f = 1/(focal length) = 1/(f nought)

    Angular Magnification = Angle...eye/Angle...object = Focal Length/fe = (f nought)/fe

    1.) Are these 2 formulas correct?
    2.) Are MP and M the same thing? (My original Q)
    3.) If not, what are the units of each? If yes, is the unit Diopters?

    Cheers
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    1. yes
    2. M=fo /fe = beta/alpha

    where:
    beta = angle of resultant ray after eyepiece
    alpha = angle of incidence to plane of lens at entry side of objective

    3. Yes. Diopters (D)
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    Oh hell forgot to add - M=1/f is true for a single lens on it's own. M=fo /fe is true for an refracting telescope where:

    fo = focal length of objective lens
    fe = focal length of eyepiece lens

    The refracting telescope image is inverted, diminished, and at infinity.
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    No worries. Take it you're doing module 5 tomorrow. All the best.
    But dont do so well you push the grade boundaries out of my reach!
 
 
 
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Updated: June 15, 2005
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