ISP Chapter 5 Light the Cosmic Messenger

ISP Chapter 5 Light the Cosmic Messenger - Chapter 5 Light...

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Chapter 5 Light the Cosmic Messenger WHAT IS LIGHT Spectrum - plot of light intensity vs. wavelength o Wavelength- distance between peaks o Frequency- the number of times per second the wave bobs up and down (hertz) o X axis is wavelength, y is intensity Light is called electromagnetic radiation The speed of light in a vacuum is constant o C=300,000 km/sec o Wavelength x frequency = c Gamma rays; x rays; uv; ir; radio Blue to red o Short wavelength to long LIGHT IS A PARTICLE Photons : particles of light o Wavelength, frequency, and energy o o WHAT IS MATTER? Elements and atomic structure o o Electrons in cloud Atomic #- number of protons in nucleus Atomic mass number - protons and neutrons in nucleus Isotope - same atomic #, different mass # Molecules - two or more bound atoms Ion
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This note was uploaded on 11/16/2011 for the course ISP 205 taught by Professor Donahue during the Fall '08 term at Michigan State University.

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ISP Chapter 5 Light the Cosmic Messenger - Chapter 5 Light...

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