reflection and refraction

Multiple Choice

What is the approximate speed of light in kilometres per second?

• 30,000

• 300,000

• 3,000,000

• 3,000

Multiple Select

Which of the following are properties of light described in the lesson?

• Light travels in straight lines

• Light can be represented as rays

• Light travels slower than sound

• Light travels very fast

Multiple Choice

Which of the following statements best explains why we see things around us?

• Because objects emit their own light directly into our eyes

• Because objects reflect light from a source into our eyes

• Because our eyes produce light that illuminates objects

• Because light travels in a curved path to reach our eyes

Multiple Choice

Which of the following best describes the relationship between the angle of incidence and the angle of reflection when light reflects off a mirror?

• The angle of incidence is always greater than the angle of reflection.

• The angle of incidence is always less than the angle of reflection.

• The angle of incidence is equal to the angle of reflection.

• The angle of incidence and angle of reflection are unrelated.

Multiple Choice

Which of the following surfaces would most likely produce a diffuse reflection?

• A polished metal sheet

• A calm lake surface

• A frosted glass window

• A new mirror

Open Ended

Explain how the surface texture of an object affects the type of reflection observed. Use examples from smooth and rough surfaces.

Multiple Choice

A periscope uses mirrors to allow a person to see over an obstacle. What principle of light is being used in this device?

• Refraction

• Diffraction

• Reflection

• Absorption

Open Ended

Describe how refraction can cause objects to appear in a different position than they actually are, using the example of the fish and the pencil in the images.

Multiple Choice

What causes the bending of light when it passes from air into water, as shown in the image with the pencil in the glass?

• The difference in temperature between air and water

• The change in speed of light due to different densities

• The color of the pencil

• The shape of the glass

Multiple Select

Which of the following statements are true about the angle of refraction as the density of the medium increases?

• The angle of refraction increases

• The angle of refraction decreases

• The emergent ray moves closer to the normal

• The emergent ray moves away from the normal

Multiple Choice

Which of the following is a similarity between reflection and refraction according to the Venn diagram?

• Both involve the ray of incident

• Both have the angle of incident equal to the angle of reflection

• Both involve light bouncing off a surface

• Both have the ray of emergent