"Reflection of Light" Light Phenomenon PPT Courseware 5

Description

"Reflection of Light" Light Phenomenon PPT Courseware 5

1. Understand the reflection of light

Light is reflected when it encounters desktops, water, and many other surfaces.

We can see non-luminous objects because the light reflected by the objects enters our eyes.

2. Explore the rules of light reflection

Explore requirements

1. Look for reflected light.

Thinking: How to display invisible incident light and reflected light?

2. Design experiments.

think:

(1) How to compare the relationship between the reflection angle and the incident angle?

(2) How to determine whether the reflected ray, incident ray and normal are on the same plane?

3. Specular reflection and diffuse reflection

reflection of mirror

When a beam of parallel light is incident on an object with a smooth surface such as a plane mirror or a calm water surface, the reflected light is parallel.

diffuse reflection

When the surface of an object is relatively rough, after reflection of parallel light, the reflected light is no longer parallel, but radiates in all directions.

4. Application of light reflection

Please cite examples of the application of light reflection in real life; and put forward your own suggestions and ideas on the light pollution problem of urban glass curtain walls.

What did you learn?

1. The law of reflection of light

2. The light path is reversible

3. Specular reflection and diffuse reflection

Homework questions

1. Investigate what kind of reflection occurs on the blackboard in the classroom? Why can’t students sitting on one side of the classroom sometimes see the words on the blackboard? Discuss solutions with classmates.

2. Hands:

As shown in the picture, lay a piece of white paper on the table in the darkroom, place a small plane mirror flat on the paper (mirror side up), and let the flashlight shine directly on the plane mirror. What phenomenon did you observe? Try to explain using the knowledge of light reflection.

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For more information about the "Reflection of Light PPT" PPT courseware, please click on the "Reflection of Light PPT Light Phenomenon ppt" tab.

"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 One 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, incident light and normal are on the same plane Reflected rays and incident rays are separated...

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Update Time: 2024-10-15

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

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