Waves and Electromagnetic Waves

Light waves are a special type of wave called an _____________.

• electromagnetic wave

• sound wave

• mechanical wave

• seismic wave

Electromagnetic waves are composed of ___________ and __________ energy, allowing the wave to move in a __________ (like outer space).

• electric and magnetic energy, allowing the wave to move in a vacuum

• electric and gravitational energy, allowing the wave to move in a medium

• magnetic and thermal energy, allowing the wave to move in a solid

• nuclear and chemical energy, allowing the wave to move in a liquid

Light waves aren't the only type of electromagnetic waves. In fact, there are many different types, which you are probably already familiar with, including: __________, __________, __________.

• Light waves

• Radio waves, microwaves, infrared waves

• Sound waves, water waves, seismic waves

• Gamma rays, X-rays, ultraviolet rays

EM waves also all travel at relatively the same speed when they travel through a vacuum. That speed is commonly referred to as the __________, which measures _______________.

• speed of light; frequency

• speed of sound; wavelength

• speed of light; wavelength

• speed of sound; frequency

When light hits something, that light can do what three things?

• Absorb, Reflect, and Transmit

• Refract, Absorb, and Dissolve

• Reflect, Absorb, and Rotate

• Refract, Emit, and Absorb

Whether a wave of light is absorbed, transmitted, or reflected depends in large part of the type of ________ (plural of medium) that the light wave hits.

• mediums

• waves

• particles

• frequencies

________________ are used to destroy cancer cells through radiation treatment.

• radiation therapy

• chemotherapy

• antibiotics

• immunotherapy

The following give off ionizing radiation: • radioactive material • very high-voltage equipment • nuclear reactions • stars

• Radioactive material

• Very high-voltage equipment

• Nuclear reactions

• Stars

_______________ is relatively low energy radiation that does not have enough energy to ionize atoms or molecules. They are located at the low end of the electromagnetic spectrum.

• Non-ionizing radiation

• Ionizing radiation

• Gamma rays

• X-rays

Which of the following is an example of non-ionizing radiation?

• Visible light

• X-rays

• Alpha particles

• Gamma rays