"Lens in Life" Lens and its Application PPT Courseware

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"Lens in Life" Lens and its Application PPT Courseware

camera composition

1. A camera is mainly composed of a lens and film. The lens is equivalent to a convex lens, and the film is equivalent to a light screen.

2. The distance from the object to the convex lens is called the object distance; the distance from the image to the convex lens is called the image distance.

3. Working principle of the camera: When the object distance is greater than 2 times the focal length, an inverted and reduced real image is formed. The image is on the opposite side of the object and the left and right sides are opposite. The image distance is greater than the focal length but less than twice the focal length.

4. When the camera is imaging, if the object is close to the lens (the object distance is reduced), the image will become larger and the image distance will also become larger, so the lens should be extended forward. The opposite is true.

5. The projector is mainly composed of a lens and a screen. The lens is equivalent to a convex lens and the screen is equivalent to a light screen.

6. Working principle of the projector: If the object distance is greater than the focal length and less than 2 times the focal length, an inverted magnified real image will be formed. The image is on the opposite side of the object and the left and right are reversed. The image distance is greater than twice the focal length.

magnifier

12. The working principle of a magnifying glass: the object distance is smaller than the focal length, forming an upright magnified virtual image. The image is on the same side of the object, the same on the left and right, and the image distance is greater than the object distance.

14. Real image: An image formed by the convergence of actual light rays. Real images can be seen with the eyes, real images can also be captured with a light screen, and real images can sensitize film.

Pinhole imaging is a real image formed by the linear propagation of light. Cameras, projectors, slide projectors, and movie projectors are all real images formed by the refraction of light.

15. Virtual image: An image formed by the convergence of reverse extension lines of reflected light or refracted light. You can see a virtual image with your eyes, but you can't pick it up with a light screen, and a virtual image can't make the film sensitive.

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"Lens in Life" Lens and its Application PPT Courseware 8:

"Lens in Life" Lenses and Their Applications PPT Courseware 8 Learning Objectives 1. Know the imaging characteristics of cameras, projectors (slide projectors) and magnifying glasses. 2. Understand the main characteristics of real and virtual images of objects. Self-study 1. What are the main parts of a camera? it..

"Lens in Life" Common Optical Instruments PPT Courseware 3:

"Lens in Life" Common Optical Instruments PPT Courseware 3 Self-Study Materials 1. What are the main parts of a camera? What is its lens equivalent? What is the equivalent of film? What are the characteristics of the images of objects on film? 2． What are the main parts of a projector?

"Lens in Life" Common Optical Instruments PPT Courseware 2:

"Lens in Life" Common Optical Instruments PPT Courseware 2 Make some equipment: two paper tubes, convex lenses, and translucent paper. Take a look. Please pick up the camera you made and face it outside the bright window. Pull the paper tube to change the lens and semi-transparent paper. What do you see between the transparent sheets? ..

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Update Time: 2024-05-31

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

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