PCS 181 Chapter 1: PCS181 WEEK 1 TEXTBOOK NOTES.pdf
7 May 2015
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One source must be paper (not textbook) Aip (american institute physics reference system) http://minutes-of-berg. livejournal. com/ Unit 1: the electromagnetic (em) spectrum astronomical information is transmitted by waves of light starlight the star"s surface temperature, chemical composition on the surface, motion, pressure, magnetic elds, etc. Sir isaac newton thought of light as a photon packet of energy, called the particle theory. If we think of light as a wave, different wavelengths will give you different colours. Humans are most sensitive to the yellowy-green region, it"s our dominant wavelength. Light is a magnetic eld and an electric eld, moving in space at right angles to each other. The em spectrum light: mutually perpendicular oscillating electric and magnetic elds light moves in wavelike pattern at a speed of c= 3x108m/s light behaves as photon and wave in certain conditions it"s called the wave/particle duality. Nothing with mass can move at the speed of the light; light is massless therefore can go at.
