On February 9, 1991, ROSAT, an orbiting observatory, finished the first ever all-sky survey of: w) radio waves. x) infrared radiation. y) ultraviolet radiation. z) x-rays. Answer : ANSWER: Z -- X-RAYS...
The cosmic background radiation, a remnant of the Big Bang, is at what temperature? w) 100K x) 0K y) 5.3K z) 2.7K Answer : ANSWER: Z -- 2.7K...
Most stars are cooler than the sun. These stars, the planets, interstellar clouds and star-forming regions emit most of their radiant energy in the: w) visible x) x-ray region y) ultraviolet z) infrared Answer : ANSWER: Z -- INFRARED...
Which of the following radiation has wavelength that are shorter than visible light? A. Gamma-rays C. Ultraviolet light E. a, c and d above B. Infrared radiation D. X-rays Answer : E. a, c and d above...
Primary cosmic radiation is characterized by: w) an intensity which is essentially constant in time x) isotropic in space y) very energetic particles z) all of the above. Answer : ANSWER: Z -- ALL OF THE ABOVE...
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