"Dispersion of Light" PPT courseware download on light phenomena

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"Dispersion of Light" PPT courseware download on light phenomena

The first part of the content: Practice on classification of knowledge points

Knowledge point 1 Dispersion of light

1. As shown in Figure 4-5-1, sunlight is white light. After passing through a prism, sunlight is decomposed into light of various colors. This phenomenon is called _____ of light. If a white screen is used to take over, a colored light band is formed on the white screen, which shows that the white light is mixed with ________.

2. Figure 4-5-2 shows the color of a color TV screen. What three colors of light are composed of the screen color? ()

A． red, blue, yellow

B. RGB

C. red, orange, yellow

D. green, purple, orange

3． After sunlight passes through a prism, it is broken down into various colors of light. People's research has found that after three kinds of color light are mixed in different proportions, various colors of light can be produced. These three colors of light are ()

A． RGB

B. Orange, yellow, green

C. yellow, purple, blue

D. green, blue, yellow

Knowledge point 3 Invisible light

4. The spectrum is divided into visible light and invisible light. Visible light includes: red, orange, ____, ____, ____, indigo, and violet. Beyond red light is _______, and beyond violet light is _______. The main characteristic of infrared rays is ________: the higher the temperature of an object, the more infrared rays it radiates, so the thermogram taken by infrared film can be used to diagnose the condition; the temperature of various objects increases after absorbing infrared rays, so people use Infrared heats objects, such as __________.

5. The air conditioner remote control can control the on, off, temperature adjustment, etc. of the air conditioner, using ()

A． Infrared ray b. UV rays

C. X-ray D． visible light

6. Which of the following statements does not belong to the function of ultraviolet rays ()

A． Helps the body synthesize vitamin D

B. Kill microorganisms

C. Diagnose disease

D. Make fluorescent substances glow

Dispersion of light PPT, part 2: comprehensive practice of regular methods

7. In order to study the dispersion of light, a classmate designed the following experiment: Place a container of water in the corner of the wall, with a plane mirror placed at an angle of 45° to the horizontal plane, as shown in Figure 4-5-3, and a thin beam of white light is emitted obliquely. toward the water surface, refracted by the water surface toward the plane mirror, reflected by the plane mirror, refracted by the water surface, and illuminated on the white paper. The student can see () on the white paper

A． Colorful light band with purple top and red bottom

B. Colorful light strips of red above and purple below

C. Ring-shaped light band with outer infrared and inner purple

D. a white light

8. As shown in Figure 4-5-4, this is the dispersion experiment of light that Newton once did. In the experiment, a beam of sunlight is projected onto a glass prism, and different colors of light can be observed within the AB range on the light screen behind the prism, then:

(1) There should be ____ light at A and ____ light at B. This experiment explains: The natural light we usually see is composed of _________.

(2) In this experiment, when Xiao Ming measured the temperature in different color light areas, he found that the thermometer placed outside ___ (optional "A" or "B") rose rapidly, indicating that there was a kind of temperature in this area. Invisible light, this kind of light is called _______, and its main characteristic is a strong ____ effect.

9. [2018·Anshan] Regarding the dispersion experiment of light, which of the following statements is incorrect ()

A． After white light passes through a prism, its propagation direction changes

B. The phenomenon of dispersion shows that white light is polychromatic light

C. When monochromatic light passes through a prism, its propagation direction does not change.

D. When monochromatic light passes through a prism, dispersion does not occur

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Update Time: 2024-10-31

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

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