Quiz 7 - Absorption, Scattering, Reflection_ FA23_ METR-112 Sec 85 - Globl Climate Chng

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10/12/23, 12:10 AM Quiz 7 - Absorption, Scattering, Reﬂection: FA23: METR-112 Sec 85 - Globl Climate Chng https://sjsu.instructure.com/courses/1571472/quizzes/1684321 1/5 Which object emits more total radiation (in other word, the radiation is more intense): Earth or Sun? Which physics law determines this fact? Sun; Wien's Law Earth; Stefan-Boltzmann Law Earth; Wien's Law Sun; Stefan-Boltzmann Law Correct! Correct! 2 / 2 pts Question 2 Which object has their peak radiation at a longer wavelength, Earth or Sun? Which physics law determines this fact? Sun; Stefan-Boltzmann Law Earth; Wien's Law Correct! Correct! Sun; Wien's Law Earth; Maxwell's equation 2 / 2 pts Question 3 What are the three possible pathways when the incoming solar radiation (insolation) reaches Earth? absorbed, conducted, or reflected.

10/12/23, 12:10 AM Quiz 7 - Absorption, Scattering, Reﬂection: FA23: METR-112 Sec 85 - Globl Climate Chng https://sjsu.instructure.com/courses/1571472/quizzes/1684321 2/5 absorbed, eliminated, or reflected. absorbed, scattered, or reflected. Correct! Correct! created, conducted, or reflected. 2 / 2 pts Question 4 Answer the questions after watching the video clip about Mar’s atmosphere Video link is provided in the slide PDF, or you can find the video link from the shared google drive folder next to lecture recording. Make sure to log in SJSU email to access Google Drive. Which of the following statement(s) is correct? (1) Astronauts wear spacesuits to provide themselves from radiation in the universe, which can be harmful for human body. (2) Mar's atmosphere was stripped away because of the solar wind from the Sun (3) Earth's atmosphere protects us from the solar radiation because Earth emits visible light. (2) and (3) (1) and (2) Correct! Correct! (1) (2) and (3) (1) 2 / 2 pts Question 5 Absorption is selective, only certain gas can absorb certain radiation.

10/12/23, 12:10 AM Quiz 7 - Absorption, Scattering, Reﬂection: FA23: METR-112 Sec 85 - Globl Climate Chng https://sjsu.instructure.com/courses/1571472/quizzes/1684321 3/5 Scattering, all gas molecules can scatter radiation and shorter wavelengths are scattered more effectively. True Correct! Correct! False 2 / 2 pts Question 6 Where is most of the shortwave radiation absorbed when it get into Earth’s system? Earth's surface Correct! Correct! Clouds Atmosphere Human beings 2 / 2 pts Question 7 What wavelength does greenhouse gases absorb? Visible light Longwave radiation, which is mainly infrared radiation Correct! Correct! UV radiation X-ray radiation

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10/12/23, 12:10 AM Quiz 7 - Absorption, Scattering, Reﬂection: FA23: METR-112 Sec 85 - Globl Climate Chng https://sjsu.instructure.com/courses/1571472/quizzes/1684321 4/5 3 / 3 pts Question 8 Select the statements below that are the reasons for why the sky is blue: 1. Sunlight reaches Earth's atmosphere 2. Earth emits planetary radiation 3. Sunlight is scattered in all directions by all the gases and particles in the air. 4. Sunlight is mostly reflected back into the space in all directions by all the gases and particles in the air. 5. Blue light is scattered less than other colors because it has shorter wavelength. 6. Blue light is scattered more than other colors because it has longer wavelength. 7. Blue light is scattered more than other colors because it has shorter wavelength. 8. As the Sun gets lower in the sky, its light is passing through the same path in the atmosphere to reach you. 9. As the Sun gets lower in the sky, its light is passing through a longer path in the atmosphere to reach you. 10. More of the blue light is scattered, and the remaining reds and yellows are more likely to get to your eyes. 11. More reds and yellows are more likely scattered and they get to your eyes. 2, 4, 6 1, 3, 7 Correct! Correct! 1, 2, 3 1, 4, 6 3 / 3 pts Question 9 Select the statements below that are the reasons for why the sunset is red: 1. Sunlight reaches Earth's atmosphere 2. Earth emits planetary radiation

10/12/23, 12:10 AM Quiz 7 - Absorption, Scattering, Reﬂection: FA23: METR-112 Sec 85 - Globl Climate Chng https://sjsu.instructure.com/courses/1571472/quizzes/1684321 5/5 3. Sunlight is scattered in all directions by all the gases and particles in the air. 4. Sunlight is mostly reflected back into the space in all directions by all the gases and particles in the air. 5. Blue light is scattered less than other colors because it has shorter wavelength. 6. Blue light is scattered more than other colors because it has longer wavelength. 7. Blue light is scattered more than other colors because it has shorter wavelength. 8. As the Sun gets lower in the sky, its light is passing through the same path in the atmosphere to reach you. 9. As the Sun gets lower in the sky, its light is passing through a longer path in the atmosphere to reach you. 10. More of the blue light is scattered, and the remaining reds and yellows are more likely to get to your eyes. 11. More reds and yellows are more likely scattered and they get to your eyes. 1,3,7,9,10 Correct! Correct! 2,4,6,8,10 1,3,5,9,11 1,2,3,6,8

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