ASTR 1102 : REVIEW SHEET Compilation Of Questions And Answers
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1. 1 x10^-10 m: one astronomical unit or 1 au is defined as: d. mean distance between the sun and earth, one light-year is the: b. D. at the speed of light, 3 x 10^8 m/s: an electrical spark such as lightning generates electromagnetic radiation over a wide spread of wavelengths. 300 m: on the absolute scale of temperature (in kelvins) the zero on the scale refers to the: b. As we increase the temperature, the wavelength at which the spectrum peaks becomes shorter and shorter. C. wein"s displacement law: we plot the intensity of the radiation emitted from a solid object at a certain temperature versus its wavelength. As we increase the temperature, the total amount of energy emitted all across the spectrum increase as the fourth power of the temperature. This is an illustration of: d. the stefan-boltzmann law: using wien"s law.
