Question

To get an overview of how a microscope works, complete the description with one of the options provided.

A simple light microscope consists of two lenses: an objective and an eyepiece. The object to be viewed is placed (At any location / at s>f / at s) so that the result is a (Real / Virtual) and (Upright / Inverted) image between the objective and eyepiece.

The image from the objective acts as the (Image / Object) of the eyepiece. It is located at (Any location / sf) so that the resulting image is (Real / virtual) and (Larger / smaller) than the image from the objective

The total magnification is the (Sum / product) of the individual magnifications

Answer 1

A simple light microscope consists of two lenses: an objective and an eyepiece. The object to be viewed is placed (at s>f ) so that the result is a (Real ) and (Inverted) image between the objective and eyepiece.

The image from the objective acts as the (Object) of the eyepiece. It is located at (s<f) so that the resulting image is (virtual) and (Larger ) than the image from the objective

The total magnification is the (product) of the individual magnifications.

Explanation:-

1) We place the object at a distance which is greater than the focal length of the objective lense. Because we want to make the real image, then only this real image will act as the object for eyepiece, if choose distance less then focal length we will end up with the virtual image.

2) The result that we get after place the object at a distance greater than than the focal length is a real image.

3) The position of the real image is Inverted.

Above three conditions that we have discussed are depicted in following ray diagram of the objective lens.

4) It should be noted that the image that we got from the objective lens will act as an object for the eyepiece lens.

5) Microscope is adjusted such that the image that we get from objective lens is present between the focal length of the eyepiece. For making the enlarged or magnified image the position of the object Must be between the focal Point and the focal length of the eyepiece. That is distance of image Must be less than focal length. If the distance is equal to the focal length then image will be formed at Infinity and if the distance is greater than focal length then image will be real and can not be seen from the eye piece.

ie object distance for the eyepiece s < f

6) The resulting image that we get from eyepiece is VIRTUAL.  

7) and, is LARGER then the image of the objective. The image that we get is highly magnified.

Conditions discussed above are dipicted in following ray diagram for eye piece only.

8) Total magnification is given as the product of the magification produced by both the the lenses ie objective and eye piece.

is magication produced by Objective.

and, is magification produced by the eye piece.

\* In case of any difficulty please comment. \

Thank you.