"Reflection of Light" PPT courseware download on light phenomena

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"Reflection of Light" PPT courseware download on light phenomena

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

Knowledge point 1: Reflection phenomenon of light

1. As shown in Figure 4-2-1, we can see objects that do not emit light because the light from the object ______ enters our eyes.

Knowledge point 2 Law of reflection of light

2. As shown in Figure 4-2-2, in order to verify the law of light reflection, Xiaoli placed a plane mirror on the horizontal table, and then placed a piece of cardboard vertically on the plane mirror.

(1) The purpose of letting light incident against the cardboard during the experiment is to ________.

(2) During the experiment, fold the right cardboard back along the ON side. _____ (optional "can" or "can't") can see reflected light on the cardboard, which means ____________________________; and the reflected light and incident light are respectively located at ____ _Both sides.

(3) In an experiment, it was found that no reflected light could be found on the cardboard anyway. The reason may be ____________________.

(4) During the experiment, it was found that the reflection angle ______ (choose "greater than", "less than" or "equal to") the incident angle. In order to obtain the general rule of the relationship between the reflection angle and the incident angle, we should ____________________.

3． Figure 4-2-3 shows the reflection of light on the surface of an object. In the figure, _____ represents the reflective surface, ____ represents the incident light, ____ is the incident point, ____ is the reflected light, and ____ is the normal line. , ___________ is the angle of incidence, ___________ is the angle of reflection.

4. A beam of light strikes a plane mirror, and the angle between it and the plane mirror is 30°, as shown in Figure 4-2-4. Then the angle between the incident light and the reflected light is ______.

Knowledge point 3: Reversibility of light path

5. Figure 4-2-5A shows the reversible light path diagram. According to this tip, if you use the experimental device to study the law of light reflection (as shown in Figure B) to study "the light path is reversible during reflection", then during the experiment The operation that should be performed is ()

A． Change the angle between light OB and normal ON

B. Change the angle between light AO and normal ON

C. Rotate plate F back and forth along the normal line ON

D. Let another beam of light incident along BO

6. Two classmates are playing a hide-and-seek game. Student A is hiding behind the bookcase. If he can see the eyes of classmate B through the full-length mirror, then classmate B ()

A． Can’t see classmate A

B. You can definitely see the whole body of classmate A

C. At least I can see classmate A’s eyes

D. None of the above statements are correct

Knowledge point 4 Specular reflection and diffuse reflection

7. As shown in Figure 4-2-6A, a beam of parallel light will be parallelly reflected after it shines on the mirror. This reflection is called ______ reflection. As shown in Figure B, when a beam of parallel light shines on an uneven surface, it will be reflected in all directions. This reflection is called ___ reflection.

8. Under normal circumstances, we can see the words on the blackboard from all directions because light occurs _______; and a small part of the blackboard is "reflective" because __________ occurs when light hits this small part. We can see objects that do not emit light from different directions because light occurs on the surface of the object.

9. Which of the following statements is incorrect ()

A． Specular reflection follows the law of reflection of light

B. After a parallel beam is reflected by a plane mirror, it is still a parallel beam

C. Diffuse reflection does not follow the reflection laws of light

D. After reflection, the incident parallel beam in diffuse reflection is no longer a parallel beam.

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

10. [2018·Yishui] The second mode is shown in Figure 4-2-7. The incident light and the plane mirror form an angle of 30°, then ()

A． The angle of incidence is 30°

B. The reflection angle is 60°

C. The angle between the reflected light and the mirror is 60°

D. The angle of incidence increases by 5° and the angle of reflection decreases by 5°.

11． At night, spread a piece of white paper on the table, place a small plane mirror flat on the white paper, and let the light of the flashlight shine directly on the plane mirror and the white paper, as shown in Figure 4-2-8. When you look at it from the side, you will see The phenomenon observed and the correct analysis are ( )

A． A mirror is brighter because light is specularly reflected on its surface

B. A mirror is brighter because light is diffusely reflected on its surface

C. White paper is brighter because light is specularly reflected on its surface.

D. White paper is brighter because light is diffusely reflected on its surface

12. Figure 4-2-9 shows the structural diagram of a bicycle taillight. At night, when the light from a car shines on the bicycle taillight, the driver can see the light reflected by the taillight and avoid it in time. The correct light path diagram of the bicycle taillight in Figure 4-2-10 is ()

13. When incident light is perpendicular to a plane mirror, the angle of incidence is ______ and the angle of reflection is ______. If the incident light does not change, when the mirror rotates 20°, the angle between the reflected light and the incident light is ______.

14. (1) Based on the incident light AO in Figure 4-2-11A, draw the reflected light OB, and mark the reflection angle and its degree.

(2) As shown in Figure B, a plane mirror is used to reflect sunlight into the well. Please draw the position of the plane mirror.

15. In the exploratory experiment of "Light Reflection Law", Xiao Ming designed the following experiment, as shown in Figure 4-2-12. The plane mirror M is placed flat on a horizontal table. E and F are cardboards glued together. F can rotate around ON.

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Update Time: 2024-07-30

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

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