"Eyes and Glasses" Common Optical Instruments PPT Courseware 3 Simple campus recruitment activity planning plan summary enterprise and institution recruitment publicity lecture PPT template is a general PPT template for business post competition provided by the manuscript PPT, simple campus recruitment activity planning plan summary enterprise and institution recruitment promotion Lecture PPT template, you can edit and modify the text and pictures in the source file by downloading the source file. If you want more exquisite business PPT templates, you can come to grid resource. Doug resource PPT, massive PPT template slide material download, we only make high-quality PPT templates!
| 文件名 如何下载使用 | 下载次数 | Download Points | 下载地址 |
|---|---|---|---|
| "Eyes and Glasses" Commo... | 4950次 | 0.00 | Free Download |
Tips: If you open the template and feel that it is not suitable for all your needs, you can search for related content "Eyes and Glasses" Common Optical Instruments PPT Courseware 3 is enough.
How to use the Windows system template
Directly decompress the file and use it with office or wps
How to use the Mac system template
Directly decompress the file and use it Office or wps can be used
Related reading
For more detailed PPT-related tutorials and font tutorials, you can view: Click to see
How to create a high-quality technological sense PPT? 4 ways to share the bottom of the box
Notice
Do not download in WeChat, Zhihu, QQ, built-in browsers, please use mobile browsers to download! If you are a mobile phone user, please download it on your computer!
1. The manuscript PPT is only for study and reference, please delete it 24 hours after downloading.
2. If the resource involves your legitimate rights and interests, delete it immediately.
3. Contact information: service@daogebangong.com
"Eyes and Glasses" Common Optical Instruments PPT Courseware 3, due to usage restrictions, it is only for personal study and reference use. For commercial use, please go to the relevant official website for authorization.
(Personal non-commercial use refers to the use of this font to complete the display of personal works, including but not limited to the design of personal papers, resumes, etc.)
Related reading
For more detailed PPT-related tutorials and font tutorials, you can view:Please click to see
Authoritative PPT Summary
"Eyes and Glasses" Common Optical Instruments PPT Courseware 3
1. The principle of seeing with the human eye: imaging through a convex lens similar to a camera
The cornea and lens work together as a convex lens.
The retina is equivalent to a light screen.
normal eyes
The lens, cornea and other tissues work together to act as a convex lens, through which the light rays emitted from the object converge on the retina to form an image of the object.
When looking into the distance: the ciliary body is relaxed, the lens is thin, and the focal length is longer. The light from distant objects just converges on the retina, and people can see distant objects clearly.
When looking closely: the ciliary body shrinks, the lens is thicker, and the focal length is shorter. The light from nearby objects converges on the retina, and people can see nearby objects clearly.
2. The principle of how the human eye can see distant and near objects clearly: the adjustment function of the lens
When the ciliary body relaxes, the lens becomes thinner, allowing light from a distance to converge on the retina, and the eyeball can see distant objects clearly.
When the ciliary body contracts, the lens thickens, allowing light from nearby areas to converge on the retina, allowing the eyeball to see nearby objects clearly.
3. Myopia and its correction
1. Cause:
The lens is too thick and its refractive power is too strong, causing the image to appear in front of the retina.
2. Correction:
Wear myopia glasses made of concave lenses.
Normal eyes, myopic eyes, farsighted eyes
The difference between the three:
What does the normal eye see?
What will myopia and hyperopia look like after correction?
(4) Discussion: The power of glasses
1. What is lens power?
The reciprocal of focal length, Φ=1/f, unit: m-1
2. What is the power of glasses?
The power of the lens is the value of the lens power multiplied by 100, D=100Φ, unit: degree
3. What do the positive and negative powers of glasses mean?
The positive and negative powers of glasses represent convex lenses and concave lenses respectively.
Class exercises:
1. Under normal circumstances, the image received on the retina looks like _____; after adding corrective glasses, the image received on the retina looks like _____. (Fill in "real" or "virtual")
2. Myopia can only see nearby objects. The possible reason is ( )
A. The lens is too thick; B. The lens is too thin;
C. The image is behind the retina; D. The eyeball is too long.
3. The possible reason why hyperopia cannot see nearby objects clearly is ( )
A. The eyeball is too short; B. The lens is too thin;
C. The image is formed in front of the retina; D. The image is formed in front of the retina.
summary:
1. Principle of seeing with human eyes:
2. The principle of seeing distant and near objects clearly with the human eye:
3. Myopia and its correction
4. Hyperopia and its correction
Keywords: common optical instrument teaching courseware, eyes and glasses teaching courseware, Beijing Normal University version eighth grade physics PPT courseware download, volume 2, eighth grade physics slide courseware download, common optical instruments PPT courseware download, eyes and glasses PPT courseware Download, .PPT format;
For more information about the PPT courseware "Common Optical Instruments in Eyes and Glasses", please click the Common Optical Instruments in Eyes and Glasses ppt tab.
"Eyes and Glasses" Lenses and Their Applications PPT Courseware 8:
"Eyes and Glasses" Lenses and Their Applications PPT Courseware 8 Learning Objectives 1. What are the main parts of the human eye? 2. How do human eyes see objects? 3. How does the human eye see objects at different distances? 4. What indicates the refractive power of a lens? 5. The formation of myopia..
"Eyes and Glasses" Lenses and Their Applications PPT Courseware 7:
"Eyes and Glasses" Lenses and Their Applications PPT Courseware 7 Think about what you know about your eyes. How do the eyes see these objects? 1. Eyes 1. Structure of the eyeball (1) Lens and cornea: the combined effect is equivalent to A convex lens (2) retina: quite...
"Eyes and Glasses" Lenses and Their Applications PPT Courseware 6:
"Eye and Glasses" Lens and Its Application PPT Courseware 6 Learning Objectives: 1. Understand the structure of the eyeball and how the eye sees objects clearly. 2. Understand the causes of myopia and hyperopia, and know how to correct myopia and hyperopia. 3. Understand the common sense of eye protection. ..