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Unformatted text preview: (nm) (E) 7460 (nm) 12. How does the Sun generate the energy that allows it to emit light? (A) Gravitational collapse of the hydrogen gas it is composed of. (B) Radioactive alpha decay of “helium‐4” atoms in its core. (C) Nuclear fusion of protons into alpha particles. (D) Nuclear fission of helium into hydrogen (E) A chemical reaction which combines hydrogen and helium atoms. 13. The brightness of the Sun, as viewed from Earth, is about 1360 watts per square meter. If you were to travel to a location that is two astronomical units away from the Sun, how bright would the Sun be? (A) 2720 Watts per (B) 1360 Watts per (C) 680 Watts per (D) 340 Watts per (E) 170 Watts per 14. There is a common misconception that it is possible to use a telescope to see the American flag on the surface of the Moon. Determine the minimum diameter of a telescope that could resolve a one meter wide object on the Moon. The distance to the Moon is 3.8 10 . Use the wavelength of green light, 500(nm), in your calculation. (A) 22(m) (B) 64 (m) (C) 232 (m) (D) 332 (m) (E) 510 (m) 15. A hydrogen atom can become ionized (have its electron removed) if it is exposed to photons of light with energy equal to or greater than 13.6 electron volts. Determine the maximum wavelength of light that can io...
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This test prep was uploaded on 02/22/2014 for the course ASTRO 1 taught by Professor Antonucci during the Spring '08 term at UCSB.

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