The fact that many radio lobes emit more intensely from the side away from the galaxy suggests that
A)they are formed by material falling into the galaxy.
B)they are powered by magnetic fields.
C)they are excited by radiation from nearby galaxies.
D)they are powered by the rapid rotation of the galaxy.
E)they are created by jets from the galaxy emitting where the material is halted.

Question

Quizplus · Accepted Answer

The fact that radio lobes emit more intensely from the side away from the galaxy suggests that they are created by jets from the galaxy emitting where the material is halted. This is because the material in the jet collides with surrounding gas, creating shock waves that slow down the material and create radio emission. The radio emission is stronger on the side where the jet material is halted due to more interaction with the surrounding gas.

The Fact That Many Radio Lobes Emit More Intensely from the Side