"Refraction of Light" Light Phenomenon PPT

Description

"Refraction of Light" Light Phenomenon PPT

Part One: Preview Perception

1. Refraction of light

1. Concept.

When light _______ from one medium to another medium, the propagation direction occurs in a ____________ phenomenon.

2. The refracted light path of light slanting from air into water (as shown in the figure).

3. The law of refraction of light.

(1) When light is incident obliquely from air into water or other media, the refracted light ray is deflected _____________, and the refraction angle is ______ the incident angle.

(2) When the incident angle increases, the refraction angle ____________; when the incident angle decreases, the refraction angle ____________.

(3) When light is incident vertically from the air into water or other media, the propagation direction is ______.

(4) In the phenomenon of refraction, the light path ______.

2. Refraction phenomenon in life

1. The water in the pool looks ______ than it actually is.

2. The chopsticks "____________" in the water.

3. When spearing fish, you should aim at the ____________ of the fish to catch the fish.

Refraction of light PPT, part 2: interactive classroom understanding

refraction of light

1. Same plane.

The refracted ray, incident ray and normal line are in the same plane.

2. Divide into two sides.

Refracted rays and incident rays are located on both sides of the normal.

3. The angles are not equal.

When light enters a transparent substance obliquely from the air, the refraction angle is smaller than the incident angle; when light enters the air obliquely from a transparent substance, the refraction angle is greater than the incident angle; when the incident angle increases (or decreases), the refraction angle also increases ( or decrease).

As shown in the figure, when light is vertically incident from the interface of one medium into another medium, the propagation direction of the light does not change. At this time, the incident angle, reflection angle and refraction angle are all 0°.

[Example] When light passes from one medium to another medium, which of the following statements is correct ()

A. The angle of refraction is greater than the angle of incidence B. The angle of refraction is smaller than the angle of incidence

C. The angle of refraction is equal to the angle of incidence D. The above situations are possible

Tip: This question examines the general and special circumstances of the refraction phenomenon of light. When light is incident perpendicularly from one transparent medium into another transparent medium, the propagation direction does not change. At this time, the refraction angle is equal to the incident angle.

Analysis: Since the question does not explain the types of these two media and whether light is incident obliquely or vertically when it is incident from one medium into another medium, when light is incident from one medium into another medium, there is It may be that the refraction angle is less than the incident angle, it may be that the refraction angle is greater than the incident angle, or it may be that the refraction angle is equal to the incident angle, so all three situations are possible, so choose D.

Answer:D

Refraction of light PPT, part three: try application

1. Refraction of light

1. A beam of light slants from water into the air, and reflection and refraction occur. The light path diagram in the figure that can correctly represent this phenomenon is ()

Light is incident from water into the air obliquely. During refraction, the refracted ray and incident ray are located on both sides of the normal, and the refraction angle is greater than the incident angle; during reflection, the reflection angle is equal to the incident angle, and B is correct.

2. As shown in the figure, a beam of light is incident from the air into the water obliquely, MN is the normal line, it can be seen from the figure: ______ is the incident angle, ______ is the refraction angle; when the incident angle gradually increases, the refraction angle will ______ (optional "increase" or "decrease"), but the total ______ (optional "greater than" or "less than") incident angle.

3. (2018·Bayannur High School Entrance Examination, Inner Mongolia) As shown in the picture, the light AO is shot obliquely from the air to the water surface. Please draw the approximate position of its reflected light and refracted light.

2. Refraction phenomenon in life

4. As shown in the picture, when the chopsticks are inserted diagonally into the water, the part in the water seems to be folded upward. This is a ____________ phenomenon. The part seen in the water is ______.

5. As shown in the picture, when people see stones on the bottom of the river by the river, what they see is the ______ (choose "real" or "virtual") image of the stone. The position of the image is smaller than the actual image of the stone. The location is ______ (please fill in "deep" or "shallow").

Keywords: Free download of PPT courseware for eighth-grade physics volume 1 of People’s Education Edition, PPT download of refraction of light, PPT download of light phenomena, .PPT format;

For more information about the "Light Phenomenon Refraction of Light" PPT courseware, please click the "Light Phenomenon ppt Refraction of Light ppt" tag.

"Refraction of Light" PPT download of light phenomena:

"Refraction of Light" PPT Download of Light Phenomenon Part One: New Knowledge Summary 1 Refraction of Light Refraction of Light: When light is incident obliquely from one medium into another medium, ________ is deflected. This phenomenon is called refraction of light. [Explanation]Light strikes two transparent substances..

"Plane Mirror Imaging" PPT courseware on light phenomena (Lesson 2):

"Plane Mirror Imaging" PPT Courseware on Light Phenomena (Lesson 2) Part One: Knowledge Points Classification Practice Knowledge Points 1 Plane Mirror Imaging Drawing 1. As shown in Figure 4-3-14, the imaging characteristics of plane mirrors are ( ) 2. [2018 Jilin] Please draw in Figure 4-3-15..

"Plane Mirror Imaging" PPT courseware on light phenomena (Lesson 1):

"Plane Mirror Imaging" PPT Courseware on Light Phenomena (Lesson 1) Part One: Classification Practice of Knowledge Points Knowledge Point 1 Explore the characteristics of plane mirror imaging 1. When Xiaonan was doing an experiment to explore the imaging of plane mirrors, he placed a glass plate vertically on a horizontal platform, and then took two sections...

File Info

Update Time: 2024-10-08

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

Preview