"Playing with Mirrors" PPT courseware

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"Playing with Mirrors" PPT courseware

Part One: Types of Mirrors

Plane mirror

1. Plane mirrors can reflect light.

2. The image in the plane mirror is equal in size to the object outside the mirror, and opposite in size.

3. Plane mirrors can change the propagation route of light.

wise Archimedes

When Archimedes was in his seventies, the Roman Empire's fleet came to attack his country. Archimedes summoned all the women in the city to the coast and asked them to use their bronze mirrors to reflect sunlight onto the sails of enemy ships. After a while, the enemy ship burst into flames. Archimedes used scientific methods to successfully repel the invaders.

concave mirror

1. Concave mirror plays the role of concentrating light.

2. When you are far away from the concave mirror, the image of the object seen in the concave mirror is upside down and smaller than the actual object; when you are close to the concave mirror, the image of the object seen in the concave mirror is upright, smaller than the actual object. The object should be large.

convex mirror

No matter how far the object is from the convex mirror, the image of the object seen in the convex mirror is always upright and smaller than the actual object.

Part 2: Practice

1. Fill in the blanks:

(1) The characteristics of plane mirror imaging are the size of the image and the object ( ), left and right ( ).

(2) The image formed by a concave mirror is larger than the actual object ( ), and the image formed by a convex mirror is larger than the actual object ( ).

(3) Place two mirrors at a right angle and place a toy in the middle. You will see ( ) a toy in the mirror.

2. Tell me, what shape of mirror can play such a role?

(1) ( ), this kind of mirror is used to concentrate light and increase the temperature.

(2) ( ), this kind of mirror is used because it can expand the scope of observation.

(3) ( ), can present an image as large as the object, and you can see yourself with this mirror.

Part 3: The role of mirrors

Think about it, what other functions do mirrors play in life?

(1) Fluoroscope: Fluoroscope is the most widely used in hospitals. It can see through your body and detect every little problem. It can also analyze people's own shortcomings and tell you their own shortcomings through report sheets.

(2) Telescope: Telescopes are always used to see far away. Under a starry night sky, you can use it to watch distant stars.

(3) Microscope: It has a high degree of magnification and can observe tiny fungi or cells. A microscope can also clearly magnify your shortcomings one by one, allowing you to recognize your shortcomings and correct them, so that you can become a pure person without "stains".

(4) The funny mirror: It always brings infinite joy to people. Looking at the almost deformed body, we can’t help but laugh out loud. We will forget the sadness, observe ourselves carefully from another ridiculous side, and draw conclusions. Such conclusion.

Keywords: Qingdao edition fourth grade science PPT courseware for the second volume free download, Playing with Mirror PPT download, .PPT format;

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"Playing with Mirrors" PPT download:

"Playing with Mirrors" PPT Download Part One: Characteristics of Mirrors The calm water surface reflects the reflection of trees. The mirror surface is flat. What are the characteristics of the shape of the mirror in our hands? Please play with the mirror in your hands in the group. What do you find? A plane mirror can reflect...

"Playing with Mirrors" PPT:

"Playing with Mirrors" PPT Part One Content: Teaching Activities Activity 1 I am a sharpshooter Design experiment: Explore how to make the laser beam bypass obstacles and hit the target. And complete the record on the activity log. Activity 2: Play with various mirrors. How to play 1: Play with concave mirrors. Play...

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Update Time: 2024-11-22

This template belongs to science courseware Qingdao Edition Fourth Grade Science Volume 2 industry PPT template

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