Electromagnetic Radiation

Radio waves

________: at the lowest energy range of the electromagnetic spectrum, with frequencies as high as 300 gigahertz (GHz) to as low as 30 hertz.

Microwaves

________: fall in the range of the electromagnetic spectrum between radio and IR.

UV light

________: a component of sunlight; however, it is invisible to the human eye.

Visible light

________ is found in the middle of the electromagnetic spectrum, between IR and UV.

IR light

________ is invisible to human eyes, but we can feel it as heat if the intensity is sufficient (most of the thermal radiation emitted by objects near room temperature is infrared)

Night vision devices

________ using active near- infrared illumination allow people or animals to be observed without the observer being detected.

Gamma radiation

________ causes damage to living tissue, which makes it useful for killing cancer cells when applied in carefully measured doses to small regions.

IR wavelengths

________ extend from the red edge of the visible spectrum at 700 nanometers (frequency 430 THz), to 1 millimeter (300 GHz)

Microwaves

________ are used for high- bandwidth communications, radar and as a heat source for microwave ovens and industrial applications.

Radio waves

________ are used primarily for communications including voice, data and entertainment media.

Radio waves

at the lowest energy range of the electromagnetic spectrum, with frequencies as high as 300 gigahertz (GHz) to as low as 30 hertz

Microwaves

fall in the range of the electromagnetic spectrum between radio and IR

Infrared (IR)

in the range of the electromagnetic spectrum between microwaves and visible light

Visible light

the wavelengths that are visible to most human eyes

UV light

a component of sunlight; however, it is invisible to the human eye

X-rays are roughly classified into two types

soft X-rays and hard X-rays

Hard x-rays

the highest energy x-rays

Soft x-rays

the lower energy x-rays

Gamma-rays

in the range of the spectrum above soft X-rays