Electromagnetic Spectrum

Electromagnetic Spectrum Basics

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Duration: 30:35
Updated: 19 Aug 2013

Electromagnetism is all around us in world in which we live. We rely on electromagnetic waves to heat our food, carry cell phone calls, and even bring music ...

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The Electromagnetic Spectrum

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Duration: 5:20
Updated: 14 Aug 2013

http://www.facebook.com/ScienceReason ... Science@NASA: EMS (Episode 1) - An Introduction To The Electromagnetic Spectrum --- Please SUBSCRIBE to Science & R...

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The Electromagnetic Spectrum Song - by Emerson & Wong Yann (Singapore)

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Duration: 4:16
Updated: 18 Aug 2013

Emerson Foo & Wong Yann made an original music video on the Electromagnetic Spectrum.

http://wn.com/The_Electromagnetic_Spectrum_Song_by_Emerson_Wong_Yann_Singapore

Tour of the Electromagnetic Spectrum

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Duration: 32:07
Updated: 19 Aug 2013

introduction of EMS: Radio Waves, Microwaves, Infrared Waves, Visible Light Waves, Ultraviolet Waves, X-Rays, Gamma Waves. Electromagnetic Waves have differe...

http://wn.com/Tour_of_the_Electromagnetic_Spectrum

Electromagnetic Spectrum

Order: Reorder
Duration: 9:55
Updated: 08 Aug 2013

Science Help at Brightstorm! http://brightstorm.com/science Understanding the different parts of the electromagnetic spectrum.

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Electromagnetic Spectrum Song

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Duration: 3:24
Updated: 18 Aug 2013

Electromagnetic Spectrum Song. Here is a video I created for my 6th grade science students to help them study.I hope you enjoy. Mr. Worldwide C.Parr So list...

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Science in Focus Electromagnetic Spectrum

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Duration: 19:09
Updated: 15 Nov 2012

http://wn.com/Science_in_Focus_Electromagnetic_Spectrum

Electromagnetic Spectrum

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Duration: 3:22
Updated: 17 Aug 2013

Today, Molly takes you on an adventures through the electromagnetic spectrum! Click here for show credits: http://bit.ly/qgNwxb twitter: @rocketboom facebook...

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The Electromagnetic Spectrum

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Duration: 2:15
Updated: 16 Aug 2013

Visible light is represented by only 1 inch on an electromagnetic scale of over 2000 miles. (from "The Universe" series about Nebulas)

http://wn.com/The_Electromagnetic_Spectrum

The Electromagnetic Spectrum

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Duration: 2:57
Updated: 07 Aug 2013

The Sun is constantly broadcasting information about its activity in the form of light waves. Find out why there's more to see than what meets the eye... www...

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Electromagnetic Spectrum Animation

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Duration: 3:35
Updated: 19 Aug 2013

Here are the different types of radiation in the EM spectrum, in order from lowest energy to highest: Radio: Yes, this is the same kind of energy that radio ...

http://wn.com/Electromagnetic_Spectrum_Animation

Electromagnetic Spectrum, Critical to our Nation's Security

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Duration: 7:51
Updated: 09 Jun 2013

Many nations around the world, including the United States, are facing a challenge regarding the use of the electromagnetic spectrum. The challenge involves ...

http://wn.com/Electromagnetic_Spectrum,_Critical_to_our_Nation's_Security

The Electromagnetic Spectrum: looking through galactic space clouds

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Duration: 5:29
Updated: 30 Jul 2013

Explains how astronomers use radiation from across the electromagnetic spectrum to reveal the secrets of our universe. Learn even more on Teaching Astronomy ...

http://wn.com/The_Electromagnetic_Spectrum_looking_through_galactic_space_clouds

Electromagnetic Spectrum

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Duration: 12:08
Updated: 04 Aug 2013

At http://ecampus.oregonstate.edu/chemistry, you can earn college credit for online Chemistry and virtual labs. With no onsite visits required for 100 level ...

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Electromagnetic Spectrum: Radio Waves

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Duration: 3:58
Updated: 01 Feb 2014

... Science@NASA: EMS Electromagnetic Spectrum (Episode 2) - Radio Waves The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation. The electromagnetic spectrum of an object is the characteristic distribution of electromagnetic radiation emitted or absorbed by that particular object. --- Please SUBSCRIBE to Science Reason: • • • --- MEASURING THE ELECTROMAGNETIC SPECTRUM The electromagnetic (EM) spectrum is just a name that scientists give a bunch of types of radiation when they want to talk about them as a group. Radiation is energy that travels and spreads out as it goes - visible light that comes from a lamp in your house and radio waves that come from a radio station are two types of electromagnetic radiation. Other examples of EM radiation are microwaves, infrared and ultraviolet light, X-rays and gamma-rays. Hotter, more energetic objects and events create higher energy radiation than cool objects. Only extremely hot objects or particles moving at very high velocities can create high-energy radiation like X-rays and gamma-rays. • ... --- RADIO WAVES Radio waves are a type of electromagnetic radiation with wavelengths in the electromagnetic spectrum longer than infrared light. Like all other electromagnetic waves, they travel at the speed of light. Naturally-occurring radio waves are made by lightning, or by astronomical objects. Artificially-generated radio waves are used for fixed and mobile radio communication, broadcasting, radar and other navigation systems, satellite communication, computer networks and innumerable other applications. Different frequencies of radio waves have different propagation characteristics in the Earths atmosphere long waves may cover a part of the Earth very consistently, shorter waves can reflect off the ionosphere and travel around the world, and much shorter wavelengths bend or reflect very little and travel on a line of sight. Discovery and utilization: Radio waves were first predicted by mathematical work done in 1865 by James Clerk Maxwell. Maxwell noticed wavelike properties of light and similarities in electrical and magnetic observations. He then proposed equations, that described light waves and radio waves as waves of electromagnetism that travel in space. In 1887, Heinrich Hertz demonstrated the reality of Maxwells electromagnetic waves by experimentally generating radio waves in his laboratory. Many inventions followed, making practical the use of radio waves to transfer information through space. Propagation: The study of electromagnetic phenomena such as reflection, refraction, polarization, diffraction and absorption is of critical importance in the study of how radio waves move in free space and over the surface of the Earth. Different frequencies experience different combinations of these phenomena in the Earths atmosphere, making certain radio bands more useful for specific purposes than others. Radio communication: In order to receive radio signals, for instance from AM/FM radio stations, a radio antenna must be used. However, since the antenna will pick up thousands of radio signals at a time, a radio tuner is necessary to tune in to a particular frequency (or frequency range). This is typically done via a resonator (in its simplest form, a circuit with a capacitor and an inductor). The resonator is configured to resonate at a particular frequency (or frequency band), thus amplifying sine waves at that radio frequency, while ignoring other sine waves. Usually, either the inductor or the capacitor of the resonator is adjustable, allowing the user to change the frequency at which it resonates. In medicine: Radio frequency (RF) energy has been used in medical treatments for over 75 years generally for minimally invasive surgeries and coagulation, including the treatment of sleep apnea. • .

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Chemistry - Electromagnetic Radiation Spectrum EMR or Light

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Duration: 7:33
Updated: 05 Jul 2013

Subscribe - http://www.youtube.com/subscription_center?add_user=mrcausey Light Wave - https://www.youtube.com/watch?v=EEgAWW4vuiI Light Particle - https://ww...

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Electromagnetic Spectrum

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Duration: 2:48
Updated: 11 Jan 2013

Clipbank video learning resources. Extracted from educational programmes for secondary schools aired on Channel 4.

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Eureka! Episode 30 Radiation Spectrum

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Duration: 4:51
Updated: 04 Aug 2013

http://wn.com/Eureka!_Episode_30_Radiation_Spectrum

High School Physics: Electromagnetic Spectrum

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Duration: 7:59
Updated: 05 Aug 2013

A brief introduction to the electromagnetic spectrum. For more information, check out http://www.aplusphysics.com.

http://wn.com/High_School_Physics_Electromagnetic_Spectrum

Electromagnetic Spectrum: Microwaves

Order: Reorder
Duration: 3:23
Updated: 29 Jan 2014

... Science@NASA: EMS Electromagnetic Spectrum (Episode 3) - Microwaves Electromagnetic radiation which has a longer wavelength (between 1 mm and 30 cm) than visible light. Microwaves can be used to study the Universe, communicate with satellites in Earth orbit, and cook popcorn. --- Please SUBSCRIBE to Science Reason: • • • --- Measuring the electromagnetic spectrum You actually know more about it than you may think The electromagnetic (EM) spectrum is just a name that scientists give a bunch of types of radiation when they want to talk about them as a group. Radiation is energy that travels and spreads out as it goes -- visible light that comes from a lamp in your house and radio waves that come from a radio station are two types of electromagnetic radiation. Other examples of EM radiation are microwaves, infrared and ultraviolet light, X-rays and gamma-rays. Hotter, more energetic objects and events create higher energy radiation than cool objects. Only extremely hot objects or particles moving at very high velocities can create high-energy radiation like X-rays and gamma-rays. • ... --- Microwaves are electromagnetic waves with wavelengths ranging from as long as one meter to as short as one millimeter, or equivalently, with frequencies between 300 MHz (0.3 GHz) and 300 GHz. This broad definition includes both UHF and EHF (millimeter waves), and various sources use different boundaries. In all cases, microwave includes the entire SHF band (3 to 30 GHz, or 10 to 1 cm) at minimum, with RF engineering often putting the lower boundary at 1 GHz (30 cm), and the upper around 100 GHz (3mm). Apparatus and techniques may be described qualitatively as microwave when the wavelengths of signals are roughly the same as the dimensions of the equipment, so that lumped-element circuit theory is inaccurate. As a consequence, practical microwave technique tends to move away from the discrete resistors, capacitors, and inductors used with lower frequency radio waves. Instead, distributed circuit elements and transmission-line theory are more useful methods for design and analysis. Open-wire and coaxial transmission lines give way to waveguides and stripline, and lumped-element tuned circuits are replaced by cavity resonators or resonant lines. Effects of reflection, polarization, scattering, diffraction and atmospheric absorption usually associated with visible light are of practical significance in the study of microwave propagation. The same equations of electromagnetic theory apply at all frequencies. While the name may suggest a micrometer wavelength, it is better understood as indicating wavelengths very much smaller than those used in radio broadcasting. The boundaries between far infrared light, terahertz radiation, microwaves, and ultra-high-frequency radio waves are fairly arbitrary and are used variously between different fields of study. Electromagnetic waves longer (lower frequency) than microwaves are called radio waves. Electromagnetic radiation with shorter wavelengths may be called millimeter waves, terahertz radiation or even T-rays. Definitions differ for millimeter wave band, which the IEEE defines as 110 GHz to 300 GHz. Above 300 GHz, the absorption of electromagnetic radiation by Earths atmosphere is so great that it is effectively opaque, until the atmosphere becomes transparent again in the so-called infrared and optical window frequency ranges. • .

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Introductory Astronomy: Electromagnetic Spectrum of Light

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Duration: 12:37
Updated: 28 Jul 2013

Video lecture discussing the electromagnetic spectrum of light in the context of introductory astronomy. Discusses wavelength, frequency, and energy of photons.

http://wn.com/Introductory_Astronomy_Electromagnetic_Spectrum_of_Light

GCSE Science Revision - Electromagnetic Spectrum

Order: Reorder
Duration: 1:05
Updated: 07 Oct 2012

http://wn.com/GCSE_Science_Revision_Electromagnetic_Spectrum

How to remember the ElectroMagnetic Spectrum...

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Duration: 3:18
Updated: 07 Aug 2013

the story was told to me by my physics teacher and a friend found the mnemonic...

http://wn.com/How_to_remember_the_ElectroMagnetic_Spectrum

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