Author Question: When strong solar winds are displaced poleward by our magnetic fields, we get A) the Van Allen ... (Read 57 times)

jayhills49 · **on:** Jul 27, 2018

When strong solar winds are displaced poleward by our magnetic fields, we get

A) the Van Allen radiation belts.
B) intense auroral displays.
C) sunspots.
D) hurricanes in the tropics.
E) droughts and dust bowls in the American West.

Question 2

Explain how the shifting spectral lines of spectroscopic binaries let us find their periods.

What will be an ideal response?

FergA · **Reply #1 on:** Jul 27, 2018

Answer to Question 1

B

Answer to Question 2

When aligned in our line of sight, there is no radial velocity, and all lines appear single. A quarter of a period later, one is approaching us with its line blue shifted, and the other is receding. Multiply this time span by four, and the two stars are back in the original positions.