Why does a reflection nebula look blue?
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The nebula is illuminated by the light of nearby stars. The shorter, blue wavelengths are scattered along our line of sight.
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What is the radiosity of a black body at 1000 K?
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How does the atmosphere of Venus circulate in comparison to the atmosphere of Earth?
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A jar holds 2.0 L of ideal nitrogen gas, N2, at STP. The atomic mass of nitrogen is 14.0 g/mol, the ideal gas constant is R = 8.31 J/mol ? K,
Avogadro's number is NA = 6.022 × 1023 molecules/mol, and 1.00 atm = 101 kPa. (a) How many moles of nitrogen are in the jar? (b) How many nitrogen molecules are in the jar? (c) What is the mass of the nitrogen in the jar?
Two slits are illuminated with green light (l = 540 nm). The slits are 0.05 mm apart and the distance to the screen is 1.5 m. At what distance (in mm) from the central maximum on the screen is the average intensity 50% of the intensity of the central maximum?
a. 1 b. 3 c. 2 d. 4 e. 0.4