Electromagnetic Spectrum

Electromagnetic Spectrum

What are

electromagnetic

waves?

When you listen to the radio, watch TV,

or cook dinner in a microwave oven, you

are using electromagnetic waves.

Radio waves, television waves, and micro-

waves are all types of electromagnetic

waves. They differ from each other in

wavelength.

Wavelength is the distance between one wave crest to the next.

Radio

Waves

Radio waves are a type of electromagnetic radiation with wavelengths in the electromagnetic spectrum longer than infrared light.

Microwaves

Microwaves are radio waves with wavelengths ranging from as long as one meter to as short as one millimeter, or equivalently, with frequencies between 300 MHz (0.3 GHz) and 300 GHz

Infrared

Infrared (IR) light is electromagnetic radiation with a wavelength longer than that of visible light, measured from the nominal edge of visible red light at 0.74 micrometres (µm), and extending conventionally to 300 µm.

These wavelengths correspond to a frequency range of approximately 1 to 400 THz,[1] and include most of the thermal radiation emitted by objects near room temperature.

Microscopically, IR light is typically emitted or absorbed by molecules when they change their rotational-vibrational movements.

Visible

light

Light or visible light is electromagnetic radiation that is visible to the human eye, and is responsible for the sense of sight.

Visible light has wavelength in a range from about 380 nanometres to about 740 nm, with a frequency range of about 405 THz to 790 THz

Ultra

Violet

Ultraviolet (UV) light is electromagnetic radiation with a wavelength shorter than that of visible light, but longer than X-rays, in the range 10 nm to 400 nm, and energies from 3 eV to 124 eV.

It is named because the spectrum consists of electromagnetic waves with frequencies higher than those that humans identify as the colour violet.

Xrays

X-radiation (composed of X-rays) is a form of electromagnetic radiation.

X-rays have a wavelength in the range of 0.01 to 10 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz (3×1016 Hz to 3×1019 Hz) and energies in the range 120 eV to 120 keV.

Gamma

rays

Gamma radiation, also known as gamma rays or hyphenated as gamma-rays (especially in astronomy, by analogy with X-rays) and denoted as γ, is electromagnetic radiation of high frequency (very short wavelength).

Gamma rays are usually naturally produced on Earth by decay of high energy states in atomic nuclei (gamma decay). Important natural sources are also high-energy sub-atomic particle interactions resulting from cosmic rays.

By Megan

Adams

The sun is the Earth's primary

source of light.

Light, microwaves, x-rays, and

TV and radio transmissions are

all kinds of electromagnetic

waves. They are all the same

kind of wavy disturbance that

repeats itself over a distance

called the wavelength.

There are 7 different

types of waves...here

is a picture to show.