Grade 6 Physics Quiz: Light and Periscope

What is reflection of light?

• When light changes color

• When light passes through a transparent object

• When light is absorbed by a surface

• When light bounces off a surface, it is called reflection of light.

What are the laws of reflection?

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

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

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

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

Give an example of reflection of light in everyday life.

• Water bottle

• Mirror

• Soccer ball

• Pencil

Explain how a mirror reflects light.

• The mirror refracts the light and changes its direction

• The mirror reflects light by bouncing it off its smooth surface.

• The mirror absorbs the light and then emits it back out

• The mirror creates its own light to mimic the objects in front of it

How does the angle of incidence relate to the angle of reflection?

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

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

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

• The angle of incidence has no relation to the angle of reflection.

What is refraction of light?

• The emission of light from a source

• The reflection of light off a surface

• The absorption of light by a medium

• The bending of light as it passes from one medium to another.

What causes refraction of light?

• Change in speed of light when passing from one medium to another

• Absorption of light by a medium

• Change in color of light when passing through a medium

• Reflection of light off a surface

Explain how a prism demonstrates refraction of light.

• The prism demonstrates refraction of light by reflecting the light in a straight line

• The prism demonstrates refraction of light by absorbing the light

• The prism demonstrates refraction of light by creating a rainbow effect

• The prism demonstrates refraction of light by bending the light as it passes through.

What is the difference between reflection and refraction of light?

• Reflection is the bouncing back of light when it hits a surface, while refraction is the bending of light as it passes from one medium to another.

• Reflection is the bending of light as it passes from one medium to another, while refraction is the bouncing back of light when it hits a surface.

• Reflection and refraction both involve the absorption of light by a surface.

• Reflection and refraction are the same thing and can be used interchangeably.

How does the speed of light change when it enters a different medium?

• It increases

• It stays the same

• It decreases

• It becomes invisible