It is possible to detect Doppler shifts due to light on each side of a rapidly spinning star. Suppose it is seen that a nearby star, relatively stationary to us, is blueshifted in light on one side of the star and redshifted in the light from the other side. Suppose a star of radius 2.5 x 108 km has a rotational period of 72 h. Light shifted from 525 nm on the side of the star moving toward us will be shifted to what wavelength?
A. 536 nm
B. 504 nm
C. 530 nm
D. 520 nm
E. 546 nm
F. 514 nm
F. 514 nm
You might also like to view...
The diagram represents energy levels in a hydrogen atom. The labeled transitions (A through E) represent an electron moving between energy levels. If an electron at level 1 in a hydrogen atom absorbs 10.2 eV of energy, it moves to level 2. What typically happens next?
A) The electron returns to level 1 by emitting an ultraviolet photon with 10.2 eV of energy. B) The electron jumps to level 3 as soon as it absorbs any additional energy. C) The electron remains in level 2 until it absorbs an additional 10.2 eV of energy. D) A different electron drops into level 1 because it is now unoccupied.
The composition of Earth's atmosphere today is about 78% ________, 21% ________, and about 1% ________, with trace amounts of other gases.
A. nitrogen; carbon dioxide; oxygen B. nitrogen; oxygen; argon C. nitrogen; oxygen; carbon dioxide D. oxygen; nitrogen; water vapor E. oxygen; carbon dioxide; nitrogen
What would the surface temperature be in this example if the greenhouse effect simply increased the surface temperature by the same number of degrees that it does today? Express your answer in degrees Celsius to three significant figures.
Is the Hubble constant really constant?
What will be an ideal response?