LIGHT 5th

Light travels in —

• compression waves

• transverse waves

• longitudinal waves

• mechanical waves

The low point of a wave is the —

• peak

• trough

• crest

• length

Light can travel through outer space. Sound cannot. Why?

• Light needs matter to travel but sound does not.

• Sound wavelengths are too small.

• Light does not need matter to travel but sound does.

• Sound wavelengths cannot be measured.

Visible light is —

• light that is opaque

• light the human eye can see

• light that is invisible

• light the human eye cannot see

Which item is opaque?

• Car door

• Car window

• Swimming pool water

• Sliding glass door

An object that allows some, but not all, light to pass through is —

• translucent

• transparent

• opaque

• mirrors

Light bouncing off an object is called —

• darkening

• refracting

• reflecting

• bending

Which item reflects light?

• Mirror

• Magnifying glass

• Prism

• Wax paper

What colors of visible light does a black shirt reflect?

• None

• White

• Black

• All

Objects are seen as different colors, because —

• objects do not reflect certain wavelengths

• objects reflect certain wavelengths and absorb others

• objects reflect wavelengths and do not absorb others

• objects cannot be seen in different colors