Focal length of eyepiece is changed by
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The focal length of the eye lens is changed by the action of ciliary muscles
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Focal length of eyepiece is changed by adjusting the magnification of the eyepiece.
- According to the sources of physics focal length of an eyepiece is defined as the distance which is calculated from the area of the principal plane of the eyepiece where all the parallel rays of light converge to any particular single point.
- It's changed by adjusting the magnification of the eyepiece within that particular focal length.
- As shorter is the length of the eyepiece the more closer the object will appear.
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