"Microscope and Telescope" Lens and its Application PPT Courseware 5

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"Microscope and Telescope" Lens and its Application PPT Courseware 5

What do scientists use when observing night phenomena?

1.Microscope

Ordinary magnifying glasses have limited magnification. If you want to see very small objects such as animal and plant cells clearly, you must use a microscope.

(1) Structure of microscope

A convex lens near the eye.

A convex lens close to the object being observed.

(2) Principle of microscope

The role of the objective lens (equivalent to a projector)

Make the observed object an inverted, enlarged, real image.

The function of the eyepiece (larger focal length) (equivalent to a magnifying glass)

The real image formed by the objective lens is magnified into a virtual image again.

The magnification of an optical microscope is equal to the product of the magnification of the objective lens and the magnification of the eyepiece.

telescope

(1) Structure of the telescope

This is a common telescope, which is also composed of two sets of convex lenses.

(2) Principle of telescope

The role of the objective lens (equivalent to a camera)

Make the observed object an inverted, reduced, real image.

The function of the eyepiece (equivalent to a magnifying glass)

The real image formed by the objective lens is magnified into a virtual image again. But still smaller than the object.

Consolidation exercises

1. There are a set of ____ at each end of the microscope barrel. The one close to the eyes is called ______, and the one close to the object being observed is ______.

2. When observing an object with a microscope, the image formed by the objective lens on the object is a magnified ______ image ("virtual" or "real"). The principle is just like the image formed by the ______ lens, and the eyepiece functions like a ______ Again, this image becomes a magnified ______ ("virtual image" or "real image").

3. The diameter of the telescope’s objective lens is much larger than the pupil of our eyes to ________.

4. The function of a telescope objective lens is to make distant objects form a ______ image (fill in "virtual" or "real") near the focus. This image is _____ (fill in "enlarged" or "reduced"). The reason Just like a ______ lens produces an image, the eyepiece acts like a ______ to magnify the image.

5. The purpose of placing astronomical telescopes outside the atmosphere is to __________.

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"Microscope and Telescope" Lenses and Their Applications PPT Courseware 4:

"Microscope and Telescope" Lens and Application PPT Courseware 4 Activity 1: Microscope Read this part on page 103 of the textbook and think about the following questions (1 minute for independent thinking, 2 minutes for group discussion) 1. What is the structure of a microscope? 2. What is the principle of microscope? (Tip: Objective lens...

"Microscope and Telescope" Lenses and Their Applications PPT Courseware 3:

"Microscope and Telescope" Lens and its Application PPT Courseware 3 Imaging Principle of Microscope The function of the objective lens is to make the object being observed into an inverted and magnified real image. It is consistent with the imaging principle of a projector. The function of the eyepiece is to magnify the real image formed by the objective lens into a virtual one...

"Microscope and Telescope" Lenses and Their Applications PPT Courseware 2:

"Microscope and Telescope" Lenses and Their Applications PPT Courseware 2 Review: Imaging Rules of Convex Lenses Thinking: What methods can be used to obtain a magnified image? Viewing angle: The angle between two straight lines drawn from the optical center of the eye to the two ends of the object being observed. Knowledge about perspective...

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Update Time: 2024-10-17

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

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