Electromagnetic waves
Wavelength
A distance from crest to crest (or trough to trough) ; expressed in meters.
Thermogram
A picture that shows regions of different temperatures in the body.
Wave
A vibration or disturbance in space
Bones and teeth
Absorb x-rays
Michael Faraday
According to _____. The changing magnetic field will produce electric field. A wave carries energy as it propagate, EM wave does the same too
Radio waves
Are a type of electromagnetic radiation with wavelengths in the electromagnetic spectrum longer than infrared light
X-Ray
Are a very energetic form of electromagnetic radiation that can be used to take images of the human body
Microwave
Are used in radar communications, and for heating in microwave ovens and in various industrial processes.
Gamma ray
Can be used to treat cancer
Gamma ray
Carry the greatest amount of energy and penetrate the most
Ultraviolet rays
Causes your skin to produce vitamin D (good for teeth and bones)
Visible light
Electromagnetic waves we can see.
Aurora borealis, disinfectant
Examples of ultraviolet light emissions
Gamma rays
Exploding nuclear weapons emit __________
Microwave
Have the shortest wavelengths and the highest frequency of the radio wave.
Perpendicular
In transverse waves, particles move ______ to the motion of the wave.
Electromagnetic wave
Is a wave that is created as a result of vibrations between an electric field and a magnetic field.
Infrared light
Is part of the EM spectrum that most people encounter in everyday life, although much of it goes unnoticed. It is invisible to human eyes, but people can feel it as heat.
Radiation treatment
It is a device used to kill cancer cells
Ultraviolet waves
It is responsible for causing sunburns
Radio, Detect, and, Ranging
Meaning of RADAR
Global Positioning Systems (GPS)
Measure the time it takes a radio wave to travel from several satellites to the receiver, determining the distance to each satellite.
Longest, shortest
Radio waves have the _____ wavelengths and _____ frequencies of all the electromagnetic waves.
Radio wave Microwave Infrared Visible light Ultraviolet X-ray Gamma ray
Seven regions of the EMS
X-Ray
Shorter wavelength and higher frequency than UV rays Carry a great amount of energy Can penetrate most matter.
Gamma ray
Shorter wavelength and higher frequency than X-rays
Visible light
Shorter wavelength and higher frequency than infrared rays.
Infrared
Shorter wavelength and higher frequency than microwaves.
Ultraviolet rays
Shorter wavelength and higher frequency than visible light. Carry more energy than visible light.
Amplitude
The distance of crest (or trough) from the midpoint of the wave
frequency
The shorter the wavelength the higher the _______
Wavelength
The smaller the frequency the longer the _______
Transverse waves
They can travel through empty space (without a medium)
Electromagnetic wave
They travel as vibrations in electrical and magnetic fields
Ultraviolet light
Through these waves are invisible to the human eye, some insects like bumblebees can see them!
Cancer
Too much exposure of x ray can cause ______
Ultraviolet radiation
Type of radiation that causes sunburn
X-Ray
Used by engineers to check for tiny cracks
Gamma ray
Used in radiation treatment to kill cancer cells
RADAR
Used to find the speed of an object by sending out radio waves and measuring the time it takes them to return.
Ultraviolet rays
Used to kill bacteria (stelerization of equipment)
Magnetic resonance imaging (MRI)
Uses short wave radio wave with a magnet to create an image
Visible light
Wavelengths that are visible to most human eyes
ROYGBIV
When light enters a new medium it bends (refracts). Each wavelength bends a different amount allowing white light to separate into its various colors.
