What information about orbital inclination can we get from visual binaries, spectroscopic binaries, and eclipsing binaries?
What will be an ideal response?
Astronomers can find the inclination of a visual binary system because they can see the shape of the orbits. In a spectroscopic binary system, however, the individual stars are not visible, so the orbits can't be mapped and the inclination can't be found. In eclipsing binary systems the inclination is edge-on.
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If the color spectrum ranges from red to violet, then it ranges from
A) low frequencies to high frequencies. B) long wavelengths to short wavelengths. C) both of these D) neither of these
A planet speeds up in its orbit as it gets closer to the sun because of
A) the torque exerted on the planet by the sun. B) conservation of energy. C) conservation of momentum. D) conservation of angular momentum. E) inertia.
A coil lies flat on a tabletop in a region where the magnetic field vector points straight up. The magnetic field vanishes suddenly. When viewed from above, what is the direction of the induced current in this coil as the field fades?
A) counter-clockwise then clockwise B) clockwise then counter-clockwise C) clockwise D) counter-clockwise E) There is no current induced in the coil.
The spectra of different elements can be distinguished because
a. they have the same spectral lines, but the lines are of different intensities. b. they have spectral lines in different positions. c. every element has one unique spectral line. d. none of the above