"Microscope and Telescope" Lens and Its Application PPT Courseware

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"Microscope and Telescope" Lens and Its Application PPT Courseware

1. Microscope

The microscope was invented at the end of the 16th century and began to be used in scientific research in the 17th century. It greatly expanded human vision, introduced human vision from the macroscopic to the microscopic, and understood the fine structures in the animal body, which directly led to the development of cytology in the 19th century. , the establishment of microbiology and other disciplines.

1. Basic composition:

(1) Objective lens: a lens close to the object,

A set of lenses is equivalent to a convex lens.

(2) Eyepiece: the lens close to the eye,

A set of lenses is equivalent to a convex lens.

2. Principles of optical microscopy:

(1) Objective lens: equivalent to the lens of a projector, forming an inverted magnified real image.

(2) Eyepiece: equivalent to a magnifying glass, (forming an upright magnified virtual image)

Magnify the image formed by the objective lens again.

Microscope magnification = objective lens magnification × eyepiece magnification.

2. Telescope

Kepler telescope (refracting telescope)

1. Basic composition: The eyepiece and objective lens are both convex lenses, f object > f eye.

2. The principle of Kepler telescope:

(1) Objective lens: equivalent to the lens of a camera, forming an inverted and reduced real image.

(2) Eyepiece: equivalent to a magnifying glass (forming an upright magnified virtual image), which magnifies the image formed by the objective lens again.

3. Exploring the Universe

Galileo was the first to point a telescope at the sky, supporting Copernicus's "heliocentric theory." First to observe Jupiter's moons, sunspots and craters on the Moon.

Neptune's blue appearance is due to the methane in its atmosphere. Neptune's atmosphere is 85% hydrogen, 13% helium, 2% methane, and a small amount of ammonia. Neptune may have a solid core, and its surface may be covered with a layer of ice. The atmosphere outside may be stratified. The surface temperature of Neptune is -218 degrees Celsius, and the surface wind speed can reach 2,000 kilometers per hour. In addition, Neptune has a magnetic field and auroras. There is also smog caused by methane being irradiated by the sun.

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"Microscope and Telescope" Lenses and Their Applications PPT Courseware 5:

"Microscope and Telescope" Lenses and Their Applications PPT Courseware 5 What do scientists use when observing night phenomena? 1. Microscope General magnifying glass has limited magnification. If you want to see very small objects such as animal and plant cells clearly, you need to use a microscope. (1) Show...

"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...

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Update Time: 2024-07-02

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

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