lunes, 20 de septiembre de 2010

the tools of astronomers

universe:everything that exist

telescope:a divice that collects light and make distands object apear closser and larger

refraction. the bending of waves as they go from one substance to another

reflection:the bouncing of waves off a surface

wavelength:the distance from one peak to the next on a wave

frequency:the number of waves that pass throught a point in a second

electromagnetic spectrum:waves of light in order by wave lenght

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