AP Physics Essentials: Light Absorption, Reflection, and Transmission

Mr. Anderson's video on light absorption, reflection, and transmission uses a green laser and gummy bears to demonstrate how light interacts with different mediums. He explains that light can be reflected, absorbed, or transmitted, affecting the color we perceive. Reflection involves light bouncing off surfaces, while absorption converts light into other energy forms, often heat. Transmission allows light to pass through a medium. The video also covers how different wavelengths interact with materials, influencing color perception. The gummy bear experiment illustrates these concepts, showing varying levels of reflection, absorption, and transmission based on the gummy bear's color.

What happens to light when it moves from one medium to another?

• It disappears completely.

• It only gets transmitted.

• It can be reflected, absorbed, or transmitted.

• It always gets absorbed.

What is the angle of reflection equal to?

• The angle of absorption

• The angle of incidence

• The angle of refraction

• The angle of transmission

Which color of light is reflected by a green leaf?

• Yellow

• Red

• Blue

• Green

What generally happens to light when it is absorbed?

• It is converted into heat energy.

• It is converted into sound energy.

• It is converted into kinetic energy.

• It is converted into electrical energy.

Which pigments in leaves are responsible for absorbing light?

• Anthocyanins

• Xanthophylls

• Chlorophyll A and B

• Carotenoids

What does light transmission mean?

• Light is reflected off the medium.

• Light is absorbed by the medium.

• Light is scattered by the medium.

• Light passes through the medium.

How do some plants maximize the use of transmitted light?

• By having a thick outer layer

• By reflecting light back through the leaf

• By absorbing all light

• By having no pigments

In the gummy bear experiment, what happens to the green laser light when it hits a red gummy bear?

• It is completely transmitted.

• It is mostly absorbed.

• It is scattered in all directions.

• It is mostly reflected.

What determines the amount of light absorbed, reflected, or transmitted by a gummy bear?

• The temperature of the gummy bear

• The pigments and chemicals inside the gummy bear

• The shape of the gummy bear

• The size of the gummy bear

What is the primary focus of the gummy bear experiment?

• To demonstrate light absorption, reflection, and transmission

• To show how light is refracted

• To analyze the color spectrum of light

• To measure the speed of light