"Reflection of Light" Light PPT download

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"Reflection of Light" Light PPT download

Part 1: Importing new lessons

From the previous study, we know that light propagates in a straight line. We see that the sun is bright outside the classroom, but there is no sunlight on the blackboard. Is there any way to bring the sunlight from outside to the blackboard? Students carefully observed what he did just now? Oh, using a plane mirror can change the propagation route of light. Do you want to know why?

Reflection of light PPT, part 2 content: new lesson learning

Think about it:

Why can we turn on the TV when we use the TV remote control in front of the mirror?

reflection of light

1.What is reflective?

When light hits a mirror, it changes its propagation direction and is reflected back. This phenomenon is called reflection or reflection.

2. How does reflected light propagate?

Reflected light also travels in straight lines.

think about it

1. Why do we need to install lampshades on lighting lamps?

The lampshade can combine the upward light of the bulb with the original downward light by reflecting it downward.

2. Why are classroom walls painted white?

White walls are good for reflection.

Reflection of light PPT, part three: conclusion summary

When light hits a mirror, it changes its propagation direction and is reflected back. This phenomenon is called reflection of light. Different objects have different abilities to reflect light. There are many examples of using light reflection in life.

Reflection of light PPT, Part 4: Classroom exercises

(1) Judgment questions

1. After sunlight shines on the mirror, it can change its original route. ( )

2. The size of the image in a plane mirror is the same as the actual size, but the left and right sides are reversed. ( )

3. The car's reflector is not a plane mirror, it does not use the reflection principle of light. ( )

(2) Multiple choice questions

1. When we move from a low-light environment to a bright light, the pupils of our eyes will ( ).

A. Enlarge B. Reduce C. No change

2. The image in the plane mirror is the same as the object ( ).

A. Same B. Left and right opposite C. Up and down opposite

3. The following are beneficial to the reflection of light ( ).

A. red B. black C. white

Reflection of light PPT, part 5: homework arrangement

Extracurricular investigation into the dangers and causes of light pollution.

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Update Time: 2024-09-08

This template belongs to science courseware Fifth Grade Science Volume 1, Textbook Edition industry PPT template

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