Light and Optics Practice Test

Light acts like

• neither a wave nor a particle.

• both a wave and a particle.

• a particle.

• a wave.

A packet of light energy is called a

• photoelectron.

• wavicle.

• wave.

• photon.

Electromagnetic waves vary in

• the way they reflect.

• the speed they travel in a vacuum.

• wavelength and frequency.

• their direction.

The full range of frequencies of electromagnetic radiation is called

• radio waves.

• invisible radiation.

• the electromagnetic spectrum.

• visible light.

The main difference between a radio wave and a light wave is its

• speed

• wavelength

• neither speed nor wacelength

• both speed and wavelength

Of the energy waves listed below, the slowest is:

• heat

• sound

• ultraviolet

• green light

The waves with the longest wavelengths in the electromagnetic spectrum are

• gamma rays

• x-rays

• infrared waves

• radio waves

The type of wave that can be used to transmit your voice on a cell phone and to cook your food in an oven is the:

• x-ray

• microwave

• ultraviolet

• gamma ray

Infrared rays have a shorter wavelength than

• radio waves

• x-rays

• gamma rays

• ultraviolet

Visible light has a higher frequency than

• gamma rays

• infrared rays

• ultraviolet

• x-rays