"Microscope and Telescope" Lens and its Application PPT Courseware 3

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"Microscope and Telescope" Lens and its Application PPT Courseware 3

The imaging principle of microscope

The role of objective lens

Make the object being observed into an inverted, enlarged real image. It is consistent with the imaging principle of a projector.

The function of eyepiece

The real image formed by the objective lens is magnified into a virtual image again. It is consistent with the imaging principle of a magnifying glass.

The principle of telescope imaging

The role of objective lens

It makes distant objects form an inverted and reduced real image near the focus, which is consistent with the imaging principle of the camera.

The function of eyepiece

The real image formed by the objective lens is magnified into a virtual image again, which is consistent with the imaging principle of a magnifying glass.

Classification of telescopes

(1) Galileo's telescope: the eyepiece is a concave lens and the objective lens is a convex lens

You can see an upright magnified virtual image

(2) Kepler Telescope: The eyepiece is a convex lens, and the objective lens is also a convex lens, but the focal length of the objective lens is long and the focal length of the eyepiece is short.

You can see an inverted and enlarged virtual image

Class exercises

There is a set of ( ) at each end of the microscope barrel, the one close to the eye is called ( ), and the one close to the object being observed is ( ).

When observing an object with a microscope, the image formed by the objective lens on the object is a magnified ( ) image (fill in "virtual" or "real"). The principle is just like the image of the lens of ( ), and the function of the eyepiece is like a ( ) again Magnify this image ( ) (fill in “virtual image” or “real image”).

The function of the telescope objective lens is to make the distant object form a ( ) image (fill in "virtual" or "real") near the focus. This image is ( ) (fill in "enlarged" or "reduced"). The principle is like ( ) The lens produces the same image, and the eyepiece acts like a ( ) to magnify the image.

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Update Time: 2024-06-27

This template belongs to Physics courseware People's Education Edition Physics for Grade 8, Volume 1 industry PPT template

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