Fifth Grade Science Volume 1, Textbook Edition
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Science Edition for Sixth Grade Science Volume 1
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Fourth Grade Science Volume 2, Textbook Edition
Fourth Grade Science Volume 1, Textbook Edition
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E-education edition fifth grade science volume 1
E-education edition fifth grade science volume 2
Qingdao Edition Fifth Grade Science Volume 2
Fourth-grade science volume 2 of the E-education edition
Fifth Grade Science Volume 2, Textbook Edition
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!["Reflection of Light" Light PPT Courseware 4](https://resources2020.oss-cn-beijing.aliyuncs.com/resources2020/e2d19e6dce96b230746a6d20a51b8ac8.jpg)
Category | Format | Size |
---|---|---|
Fifth Grade Science Volume 1, Textbook Edition | pptx | 6 MB |
Description
"Reflection of Light" Light PPT Courseware 4
Review before class
1. How does light spread?
Light travels in straight lines.
2. What is the speed of light propagation?
The speed of light propagation is 300,000 kilometers per second.
3. How many minutes does it take for light to reach the earth from the sun?
It takes 8 minutes for light from the sun to reach the earth.
Light travels in straight lines, but when we block the path of light with a mirror, we find that the light changes direction.
When light hits a mirror, it changes its propagation direction and is reflected back. This phenomenon is called reflection of light, also called reflection. Reflected light also propagates in a straight line.
Key points of this section:
1. When light hits a mirror, it will change the direction of propagation and be reflected back, forming a reflection phenomenon.
2. Reflected light also propagates in a straight line.
extracurricular development
Changes in eye pupils?
When the light is strong, the pupil constricts; when the light is weak, the pupil dilates.
After class, use a mirror to look at your eyes, move your head from the dark to the light, and observe the changes in your pupils?
judge
1. After sunlight shines on the mirror, the original route can be changed. ( )
2. The size of the image in a plane mirror is the same as the real object, but the left and right sides are opposite. ( )
3. The car's reflector is not a plane mirror, it does not use the reflection principle of light. ( )
4. Paint the walls in the room white to make the room brighter. ( )
5. Using mirrors, we can reflect sunlight onto the blackboard in the classroom. ( )
1. When light hits a mirror, it changes its propagation direction and is reflected back. This phenomenon is called light ( ).
A. Refraction B. Reflection C. Direct radiation
2. When we move from a weak light environment to a bright light, the pupils of our eyes will ( ).
A. Enlarge B. Reduce C. No change
3. The images in the plane mirror are all the same as the objects ( ).
A. Same B. Left and right opposite C. Up and down opposite
4. Which of the following is beneficial to the reflection of light ( ).
A. red B. black C. white
5. Which of the following does not use the principle of light reflection ( ).
A. The forehead mirror worn by the doctor B. The white paint inside the lampshade C. Shadow puppet show
6. The two lenses of the periscope are ( ).
A. Plane mirror B. Concave mirror C. Convex lens
7. The main reason for painting the classroom walls white is ( ).
A. Beautiful B. Conducive to light reflection C. Insulation
8. The reflected light propagates in the form of ( ).
A. Polyline B. Straight line C. Curve
9. Among the following objects, the one with the best reflective performance is ( ).
A. Plane mirror B. White wall C. Concrete floor
draw a picture
1. Please add two plane mirrors in the picture and place them in the correct position, and show the path of the light entering the lens tube in the horizontal direction.
2. In a dark room, why can I see the words on the book when the lamp is on? Please draw a map of the light's propagation route.
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For more information about the "Reflection of Light" PPT courseware, please click the "Reflection of Light ppt" ppt tag.
"Reflection of Light" Light PPT download:
"Reflection of Light" Light PPT Download Part One Content: Introduction to New Lesson Through the previous study, we know that light propagates in a straight line. We see that the sun is shining brightly outside the classroom, but there is no trace of sunshine on the blackboard in the classroom. Do you have a way to put the light outside? Sunlight please go to the blackboard..
"Reflection of Light" Light PPT:
"Reflection of Light" Light PPT Part One: Illuminating the Target Turn on the flashlight switch and let the light illuminate the book on the table from top to bottom. How does light illuminate the book? Draw the path of light on the diagram. Without changing the position of the flashlight, stand the book up. At this time,...
"Reflection and Refraction of Light" PPT:
"Reflection and Refraction of Light" PPT Part 1 content: Reflection of light When light hits the surface of an object, part of the light will be reflected back by the surface of the object. The law of reflection of light reflects that the reflected light, the incident light and the normal are on the same plane Reflected rays and incident rays are separated...
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Update Time: 2024-09-08
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