LIGHT AND THE ELECTROMAGNETIC SPECTRUM ODER OF ELECTROMAGNETIC SPECTRUM FROM LONGEST WAVES TO SHORTEST Micro waves Ultraviolet light rays X-rays COLORS OF VISIBLE LIGHT R O Y G B I V Red, Orange, Yellow, Blue, Indigo, Violet NATURE OF AN ELECTROMAGNETIC WAVE An electromagnetic wave consists of an electric field and a magnetic field positioned at right angles to each other and to the direction of the motion of the wave.
THE ELECTROMAGNETIC SPECTRUM Electromagnetic waves are often arranged in order of wavelength and frequency and what is known and the electromagnetic spectrum.
RADIO WAVES The waves in the electromagnetic spectrum that have the lowest frequency and the longest wavelengths are called radio waves.
INFRARED RAYS Electromagnetic waves with frequencies with frequency slightly lower than visible light are called infrared rays. Although infrared rays cannot be seen, they can be felt as heat.
VISIBLE SPECTRUM The electromagnetic waves that you can see are called visible light. Notice that visible light – red, orange, yellow, green, blue, indigo, violet- is an extremely small portion of the spectrum. The rest of the electromagnetic spectrum is invisible to the unaided eye.
ULTRAVIOLET RAYS Electromagnetic wave with frequencies just higher than visible light are called ultraviolet rays. The energy of ultraviolet rays is great enough to kill living cells. So ultraviolet rays are often used to kills germs in hospitals and to destroy bacteria and preserve food in processing pants.
X-RAYS Electromagnetic waves with frequencies just above ultraviolet rays are called X-rays. The energy of X-rays are great enough to pass through many materials, including your skin. Denser materials though, like your bones, absorb X-rays, which allows a picture to be taken of your bones.
GAMMA RAYS The electromagnetic waves with the highest frequencies and shortest wavelengths are called gamma rays.
VISIBLE LIGHT Anything that can give off its own light is called a luminous object.
PRODUCTION OF LIGHT Three types of light that can be produced by a luminous object are incandescent light, fluorescent light, or neon light. Which electromagnetic waves have the shortest wavelength?Gamma Rays-have the smallest wavelengths and the most energy of any other wave in the electromagnetic spectrum. These waves are generated by radioactive atoms and in nuclear explosions.
What has the shortest wavelength but the highest frequency?Violet - shortest wavelength, around 400-420 nanometers with highest frequency. They carry the most energy.
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