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Electromagnetic Radiation Definition: Characteristics of Waves Wavelength ( λ ): Frequency (v):

Other relevant Info. White light can be separated into ________ ________________________________________ The color with the highest frequency is_______/ with the lowest frequency is _________ List the different forms of electromagnetic radiation in order of least to greatest frequency:____

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Electromagnetic Radiation Definition: Characteristics of Waves Wavelength ( λ ): Frequency (v):

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  1. Other relevant Info. White light can be separated into ________ ________________________________________ The color with the highest frequency is_______/ with the lowest frequency is _________ List the different forms of electromagnetic radiation in order of least to greatest frequency:____ ____________________ ____________________ ____________________ As photon energy increases, what happens to wavelength and frequency?_______________________________ Electromagnetic Radiation Definition: Characteristics of Waves Wavelength (λ): Frequency (v): Amplitude: Draw and Label the parts of a wave:

  2. Electrons in Atoms

  3. When did studying light become important? • In the early 1900’s scientist discovered that certain elements gave off visible light when heated in a flame. Analysis of this light revealed that an element’s chemical behavior is related to the arrangement of electrons. • Because of this, it became important to understand nature of light

  4. Wave Nature of Light • Electromagnetic radiation: a form of energy that exhibits wavelike behavior as it travels through space. Examples Visible light from the sun, microwaves, x-rays, radio waves, etc

  5. Characteristics of Waves Wavelength: λ • shortest distance between equivalent points on a continuous wave; measured from crest to crest or trough to trough • expressed in meters, centimeters, or nanometers Frequency: v • The number of waves that pass a given point per second • Expressed in hertz (Hz or s-1) Amplitude • Wave’s height from the origin to a crest or origin to a trough crest amplitude origin

  6. Electromagnetic Wave RelationshipAll electromagnetic waves travel at the speed of light (C) 3.00 x 108 m/s c = λ v where c is the speed of light, λ is wavelength, and v is frequency Example: What is the wavelength of a microwave with a frequency of 3.44 x 109 Hz? λ = c/v λ = 3.00 x 108 m/s = 8.72 x 10-2 m 3.44 x 10 s-1

  7. Electromagnetic Spectrum • Although the speed of Electromagnetic waves is the same, wavelengths and frequencies can be different (ex: higher frequency = shorter wavelength) • White light, such as sunlight, can be separated into a continuous spectrum of colors if passed through a prism. These are the colors of the rainbow (roy g biv – red, orange, yellow, green, blue, indigo, violet)

  8. Electromagnetic Spectrum • Electromagnetic spectrum (EM spectrum) is all forms of electromagnetic radiation where the only difference in the types of radiation is their wavelengths and frequencies

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