What happens to energy from the Sun when it reaches Earth?
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Q: frequency of a photon
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1. What happens to energy from the Sun when it reaches Earth?
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- 5. Wien's Law states that the peak wavelength of of photons emitted by an object is inversely proportional to the object's absolute temperature. For a 4,000 K body, the peak photon wavelength is 1000 nm. What is the peak wavelength of photons emitted by an object with a surface temperature of 212 F?How are neutrinos observed? a. by using a large tank of cleaning fluid buried deep in beneath Earth’s surface b. by using spectral observations c. by using a radio receiver d. by using a Schmidt-Cassegrain focus e. by using a magneto-hydrodynamic detector6. Match the description of a process with the corresponding arrow in the figure: a. Absorption of a photon whose energy is E₁ - Eo. E3 b. Absorption from an excited state (a rare event at ordinary temperatures). E2 c. Emission of a photon whose energy is E3 - E₁. d. Emission of a photon whose energy is E₂ - Eo. e. In drawing arrows to represent energy transitions, which of the following statements is correct? i. It doesn't matter in which direction you draw the arrow as long as it connects the initial and final states. E₁ ii. For emission, the arrow points down. iii. For absorption, the arrow points up. iv. The tail of the arrow is drawn on the initial state. Eo v. The head of the arrow is drawn on the final state. vi. It is not necessary to draw an arrowhead.
- 2. Model the tungsten filament of a lightbulb as a blackbody at temperature 2 900 K. Determine the wavelength of light it emits most strongly.7.Why did Max Planck suggest that light had particle-like properties? A.Blackbody radiation could not be explained using the wave properties of light. B.The speed at which light travels through a vacuum could not be explained using its wave properties. C.Hydrogen’s emission line spectrum could not be explained using the wave properties of light. D.The way light travels through different mediums could not be explained using its wave properties.47. The Special Theory of Relativity describes space and time differently than the descriptions found in classical physics. Which selection below lists phenomena that are only explainable using the Special Theory of Relativity? A. Time dilation and atomic spectra B. mass-energy equivalence and "entropy increase" C. The speed of light as a cosmic speed limit and the Michelson- Morley Experiment D. Quantum theory and wave-particle duality <
- 13.) Which of the following is not true of nuclear fusion? a. nuclear fusion produces helium b. nuclear fusion requires extremely high temperatures c. nuclear fusion reactors produce more energy than they consume1. What is fusion? a. What is it used for? b. What is the beginning atoms? c. What is the end result (3An object at an initial temperature of 27 degrees C is raised to a temperature of 877 degrees C. How much more energy does the object emit as blackbody radiation at the higher temperature compared to the lower temperature? a. 32.5 b. 215.9 c. 864.5 d. 1,113,123
- 10. Show explicitly that if the Sun's photosphere were not ionized, its mean molecular mass would be u 1.25.Multiple Choice Condition for solar nuclear fusion to take place a. Extremely hot temperature and gravity b.Extremely hot temperature and density c. Extremely hot temperature and large volume d. Extremely hot temperature and kinetic energy e. Extremely large energy and velocity, E = mC21. The speed of light in vacuum is 3 X 105 km/s and 1 km = 1,000 m and 1m = 100 cm. Use c = f A to determine the frequency of a photon with a wavelength of 2 cm.