Electromagnetic Waves

Ellie Simonpietri

What is an Electromagnetic Wave?

An electromagetic wave is a wave that can travel without a medium to go through. For example, this type of wave can travel through the vacuum in outer space

What Disturbance Causes an Electromagnetic Wave?

These type of waves are devolped by a vibrating eletric charge

Electromagnetic Wave vs. Mechanical Wave

The biggest major difference is that a mechanical wave requires a medium to travel, while the electromagnetic wave does not. Also mechanical waves are typically slower.
The Electromagnetic Spectrum

Radio

Radio Ranges-

Wave length: >1

Frequency: very low

Energy: very low


Everyday Use

  • radio
  • GPS

Microwave

Microwave Ranges-

Wave length: 1 to 10^-3

Frequency: low but higher than radio

Energy: low but higher than radio


Everyday Use

  • cooking
  • wifi

Infared

Infared Ranges-

Wave length: 10^-3 to 10^-6

Frequency: lower mid

Energy: lower mid


Everyday Use

  • toaster
  • television remote controls

Visible Light

Visible Light Ranges-

Wave length: 8x10^-7 to 4x10^-7

Frequency: mid

Energy: mid


Everyday Use

  • vision
  • CDs

Ultra-Violet

Ultra-Violet Ranges-

Wave length: 3x10^-7 to 10^-8

Frequency: medium high

Energy: medium high


Everyday Use

  • sun beds
  • security pens

X-Ray

X-Ray Ranges-

Wave length: 10^-8 to 10^-12

Frequency: high but lower than gamma

Energy: high but lower than gamma


Everyday Use


  • produce photographs of bones
  • check metal componets and welds

Gamma Ray

Gamma Ray Ranges-

Wave length: <10^-12

Frequency: very high

Energy: very high


Everyday Use

  • kills cancer cells
  • sterilise surgical instruments