Electromagnetic waves

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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.


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