4th SI Electromagnetic Waves POWERPOINT

Definition: Gamma Rays

A electromagnetic wave with the

highest frequency.Frequency Range>10^19 Hertz

Moon seen with Gamma Rays.

• Important Info. 1– Can treat cancer by killing disease cells.

• Important Info. 2– Most powerful of all EM waves.

• Important Info. 3– Shortest wavelength of all light waves.

By: Jason Ong, Zac Capel, Lauren Tucker, and Morgan Hillard

Infrared Waves

• Definition: A category of light waves with wavelengths slightly longer than red visible light and can be felt as heat.

• Frequency Range: 1-400 THz

A demonstration of using infrared waves through the body of a dog. Showing the dogs temperature variations.

Important info

• Electromagnetic radiations• Used to show temperature variations• Wavelength is longer than visible light

By: Jasmine Feng, Andi Kasper, Michael Tan, and Florence Min

Microwaves• Microwaves are electromagnetic waves with a relatively high

frequency that are longer than infrared waves but shorter than radio waves

• The frequency range for microwaves is 109 to 1011 Hertz

This diagram shows how microwaves are used in a “microwave” to cook food

Important Information

• The length of microwaves can be between 30cm and 0.33 mm

• Microwaves are used in cooking and in radars• Microwaves are longer than infrared waves

but shorter then radio waves

By: Joel Ludin, Emily Zeaman, and Matthew Bodziak

Radio Waves• A radio wave is an electromagnetic that has the lowest possible frequency,

greatest wavelength, and the least amount of energy of light waves. • The frequency range of Radio Waves is 3kHz to 300GHz, and has a

wavelength of tenths of meters to millions of meters.

Air traffic control centers use radar to track the location and speed of airplanes. This is a digital display of the data collected.

Important Information• Radio Waves combine with RADAR and the Doppler Effect to allow police and air

traffic control towers to track speed, using technology such as RADAR systems.• The radio wave portion of the electromagnetic spectrum includes TV signals,

AM/FM radio signals, and other radio waves.• Radio waves carry signals to televisions and cellular phones, allowing pictures to

transfer between devices.

By Alex Gunnerson, Daniel Guo, and Ian Erkkila

TV and Radio Waves

By:Austin Bolomey, Ryan Xie,

and Aaron Friedman

Definition and Frequency Range

Definition• An Electromagnetic wave longer than

microwaves.Frequency Range

• One tenth of a meter to millions of meters

Various TV, AM, and FM waves.

Important Info

• Used for communications.• Radar- radio detection and ranging- used to

determine velocity and location.• Includes TV Waves, AM and FM radio, and

Radar.

By: Aaron Friedman, Ryan Xie, and Austin Bolomey

Ultraviolet light

• Definition: An invisible germicidal, light that comes from the sun or any other source of light.

• Frequency range: 7.5x1014 through 3x1016

UV light has more energy but a shorter wavelength than infrared light and visible light

1.UV light is invisible light, so it can’t be seen.

2.It has higher energy and a shorter wavelength than visible light

3.The sun is the main source of UV light, I can damage skin and cause sunburn. It is the light they use in tanning beds.

By: Maria Ulatowski, Emily Gilbert, Celia Schwartz, Matt Besmen

Visible Light

• Visible Light is electromagnetic light that can be seen by humans.

• Frequency: 400-790 Thz• Wavelength: 390-750 nm

Visible light shown in an electromagnetic spectrum.

Visible Light

• Wavelength correspond with colors.• Humans cannot see some colors such as

unsaturated pink.• The ocean is blue because:– The ocean reflects the sky.– Particles in water reflect the blue light.

By: David, Alark, Peter

X-Rays

Definition & Frequency Range

• Definition: A relatively light energy wave with a wavelength from .10 to 10 nanometers. These photons are used especially in medicine for the penetrating ability.

• Frequency Range: 3.116 Hz to 3x1019 Hz

This is an x-ray of a persons chest.

Important Information

• Used in medicine for penetrating ability.• Smaller wavelength than UV waves, therefore

containing more energy.• X-rays do not go through dense materials,

therefore you see shadows.

By: Igor Tutelman, Nathan Altstadt, Tessa Tenorio and Lauren Huang