Electromagnetic Rays

Christopher Card period 7

What is and Electromagnetic Rays?

Electromagnetic waves are waves which can travel through the vacuum of outer space.

Different terms used for Em (Electromagnetic Waves)

Wavelength Range-

"This "visible light" corresponds to a wavelength range of 400 - 700 nanometers (nm) and a color range of violet through red. The human eye is not capable of "seeing" radiation with wavelengths outside the visible spectrum"

Frequency Range

is how many of the waves are occurring in a range.

Velocity in a Vacuum

"The velocity at which that happens is called Terminal velocity. Now, if the object is in vacuum (''a space entirely devoid of matter'') there are no molecules of air to collide with our object. The only force on the object (if placed in a gravitational field) is the gravitational force." The speed is 300,000,000 m/s.


Two types of waves

- Transverse Wave

Big image

- Longitudinal Wave

Big image

Here are some different ways EM waves are used throughout our days.

Broadcast Radio

The radio is a good example of an EM wave because, waves are transferred from a radio tower to your car or stereo antenna. Hinting at its name radio is what wave that are used during the transfer.


Magnetic Resonance Imaging (MRI) is a test that uses a magnetic field and pulses of radio wave energy to make pictures of organs and structures inside the body.


The TV uses radio waves to transfer the picture and sound from you network carrier to your house.

Negative and Positive impacts about radio waves

: Pros -

: Cons -

How do Radio Waves work?

Radio waves video

This video is explaining what are radio waves on using everyday examples. it also explains how they work and somethings it may be used for. in a short 1:30 min video.