8J Light (LA)

What can't sound travel through?

• air

• water

• rock

• vacuum

What kind of wave is light?

• circular

• transverse

• longitudinal

• compression

Which of the following would transmit light?

• a transparent material

• an opaque material

What happens to light when it reaches an opaque material?

• reflected only

• transmitted

• absorbed only

• both reflected and absorbed

What line is drawn at 90 degrees to the mirror and helps us to draw ray diagrams for reflections?

• normal

• line of reflection

• line of refraction

If the angle of incidence is 20 degrees, what would the angle of reflection be in a plane mirror?

• 20 degrees

• 30 degrees

• 10 degrees

• 0 degrees

What does scattered mean?

• reflected

• moving in all directions

• absorbed

• transmitted

The image in a plane mirror:

Is the _____________ distance behind the mirror as the object is in front of it.

Why does light refract as it moves from air into glass?

• The speed of light in glass is slower than it is in the air.

• The speed of light in glass is faster than it is in the air.

• The glass makes the light speed up

• The air is denser than the glass.

What happens to the angle of refraction for light that travels from air into glass?

• It becomes smaller

• It gets bigger

• It stays the same

• It depends on the colour of the light used.