"Light and Shadow" Colorful Light PPT Courseware 2

Description

"Light and Shadow" Colorful Light PPT Courseware 2

light source

Observe the objects below. Which ones glow by themselves and which ones don’t?

Objects that can emit light by themselves, such as electric lamps and the sun, are called light sources.

Analyzing conditions:

1. In the glowing state

2. Can emit light on its own

shadow game

Observe the following experimental phenomena and summarize the conditions for shadow generation.

How are shadows created?

Under the illumination of light, objects have shadows.

Conditions for shadow generation:

light, occlusion, screen

Making a pinhole imaging box

Production steps:

1. Find a small paper box and cut a round hole with a diameter of about 1 mm in the center of the paper box lid.

2. Remove the bottom of the paper box and cover it with a piece of translucent paper as a screen.

3. Assemble the paper box cover and paper box. Aim the small hole at the scenery outside, adjust the distance between the screen and the small hole, and you can see a reduced or inverted image of the scenery on the screen.

Think about it, will the moon shine? Can it be called a light source? Why?

Do you know what applications lasers have in life and medicine?

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For more information about the "Colorful Light and Shadow" PPT courseware, please click the "Colorful Light ppt Light and Shadow ppt" tab.

"Light and Shadow" Colorful Light PPT Courseware 3:

"Light and Shadow" Colorful Light PPT Courseware 3 Riddle There is a good friend who walks with me every day, sometimes walking in front, sometimes walking behind. I have a good friend who follows me every day. When I talk to him, he never opens his mouth. ... ... ... In the shadow game, shadow generation requires specific...

"Light and Shadow" colorful light PPT courseware:

"Light and Shadow" colorful light PPT courseware 1. Understanding the light source Note: The moon is not a light source, it does not emit light by itself, it only reflects the light of the sun. Definition of light source: an object that is emitting light by itself like a lamp 2. Conditions for shadow generation Light source blocking screen ... ...

"Light and Shadow" PowerPoint animation download:

This PowerPoint animation, with the theme of light and shadow, tells relevant content about life, emotion, and growth. PPT animation uses black as the background color, and uses light bulbs, film and other materials as PPT background images. It is a dynamic PPT animation with personality and artistic flavor..

File Info

Update Time: 2024-11-21

This template belongs to science courseware Hunan Education Edition Third Grade Science Volume 2 industry PPT template

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