Physics 1 Problem Solutions 266

Physics 1 Problem Solutions 266 - 262 Chapt. 34 Maxwells...

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262 Chapt. 34 Maxwell’s Equations, Electromagnetic Radiation and Special Relativity a) If the wavelength were to be 10 4 Earth radii what would the frequency be? (The radius of the Earth is about 6370 km—that’s kilometers not meters.) b) What would the period be? 034 qfull 00420 1 3 0 easy math: frequency width, 1st order approximation 2. A particular helium-neon laser emits light at 632 . 8 nm with a wavelength width of 0 . 010 nm. What is the corresponding frequency width? 034 qfull 00510 1 3 0 easy math: Solar constant, Pluto 3. The total luminosity of the Sun is 3 . 86 × 10 26 W and the mean Sun-Earth distance is 1 . 496 × 10 11 m. a) What is the intensity (i.e., energy per unit time per unit area) at the Earth? b) Given that Pluto (formerly the ninth planet) is at about 40AU (i.e., 40 astronomical units or 40 times the Sun-Earth distance), what approximately is the intensity at Pluto? 034 qfull 00520 2 5 0 moderate thinking: solar constant and insolation
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