quiz3_solution

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McGill University *

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181

Subject

Astronomy

Date

Apr 3, 2024

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pdf

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3

Uploaded by DeanInternetRat44

Quiz 3 solution 1 Quiz 3 solution  Mars has nearly zero atmosphere. What colour will the setting Sun look to a viewer on Mars? white The Sun emit wave at all wavelength, while the spectrum is peaked at blue- green. The mixture of colour appears white without the scattering effect of the atmosphere.  When does the Full Moon rise? At Sunset Full Moon appears only when the Moon is opposite the Sun. At this position the Moon rise at sunset.  In the Earth's amosphere, how much more scattered is sunlight having wavelength 350 nm compared to light having wavelength 700 nm? 16x Rayleigh scattering:  Imagine the Earth's obliquity were 0 degrees. Which of the following would be true? There would be no seasons. I λ 4 1 = I 700 nm I 350 nm ( ) = 350 700 4 16
Quiz 3 solution 2 The celestial equator and the ecliptic would align. All days would last 12 hours. The Sun would always rise exactly in the East. The constellations of the zodiac would remain the same as they are presently. Winter in the Southern hemisphere would coincide with Summer in the North  Summer is hot because that's when the Earth is closest to the Sun. False Earth is at its closest point to Sun (called Perihelion) in January, which is winter for us. In fact, there is summer because Earthʼs axis is tilted.  On average in the Universe, how much more abundant is calcium compared to gold? 1,000,000 times more Read from the cosmic elemental abundance diagram, Ca is about 6 orders of magnitude more abundant than Au.  If the Sun magically shut off, how long would it take a viewer on Jupiter to know?
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