Focal Length of Objective in Microscopes and Telescopes Formulas

Focal Length of Objective is the distance between the objective lens and the point where the object is in focus in a microscope or telescope. And is denoted by f_o. Focal Length of Objective is usually measured using the Centimeter for Length. Note that the value of Focal Length of Objective is always positive.

Microscopes and Telescopes formulas that make use of Focal Length of Objective

fxMagnification of Eyepiece when Image Formed at Least Distance of Distinct VisionGo

fxMagnifying Power of Astronomical Telescope when Image Forms at InfinityGo

fxLength of Astronomical TelescopeGo

fxLength of Astronomical Telescope when Image Forms at InfinityGo

fxMagnifying Power of Galilean Telescope when Image Forms at InfinityGo

fxMagnifying Power of Terrestrial Telescope when Image Forms at Least Distance of Distinct VisionGo

fxMagnifying Power of Terrestrial Telescope when Image Forms at InfinityGo

fxLength of Terrestrial TelescopeGo

fxLength of Terrestrial Telescope when Image Forms at InfinityGo

FAQ

What is the Focal Length of Objective?

Focal Length of Objective is the distance between the objective lens and the point where the object is in focus in a microscope or telescope. Focal Length of Objective is usually measured using the Centimeter for Length. Note that the value of Focal Length of Objective is always positive.

Can the Focal Length of Objective be negative?

No, the Focal Length of Objective, measured in Length cannot be negative.

What unit is used to measure Focal Length of Objective?

Focal Length of Objective is usually measured using the Centimeter[cm] for Length. Meter[cm], Millimeter[cm], Kilometer[cm] are the few other units in which Focal Length of Objective can be measured.

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