The fact that many radio lobes emit less intensely on the side of the galaxy facing away from Earth suggests that a.they are formed by material falling into the galaxy. b.they are powered by black body radiation. 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 of high-speed matter in magnetic fields, which tend to emit photons in the direction they are moving.

Answer e. they are created by jets of high-speed matter in magnetic fields, which tend to emit…

Answered: The fact that many radio lobes emit…

Similar questions

The Sun appears to be yellow when overhead because:1. The human eye is most sensitive to yellow. 2. Yellow frequencies are transmitted better through the atmosphere. 3. Air does not absorb yellow frequencies. 4. The temperature of the Sun is 6000 K. 5. More than one of the above. 6. None of the above.
2) Interstellar dust radiate most of its energy at 100 μm. Assuming the dust to be a blackbody estimate the temperature of the interstellar dust. (
How does the intensity of radiation emitted from a star vary with distance from the star? Explain.
2. During the experiment, the lights will be turned down. You will observe the electron beam as a purple green glow. This is caused when a small fraction of the electrons strike some of the very low density of mercury atoms in the residual gas of the partial vacuum. The beam electron knocks one of the atomic electrons into a higher energy orbit momentarily. When it comes back down to its ground state, the colored light is emitted. Why does the beam still seem to go in a circle, if the light only comes when an electron collides with an atom and hence is scattered off in some random direction?
8. Milky Way The Sun is a star in the Milky Way galaxy. When viewed from the side, the galaxy looks like a disk that is approximately 100,000 light-years in diameter (a light-year is the distance light travels in one year) and about 1000 light-years thick (Figure P25.8). What is the diameter and thickness of the Milky Way in meters? In kilometers? In miles? Figure P25.8 Galactic Longitude 75.000 ittarius Sagitt Arm Onan Perseus Arm Arm 15,000 30.000 180° Scutum-Ce 270° Sun and solar system's location in the Milky Way
Calculate the wavelength of the em wave required to ionize a hydrogen atom (i.e., remove the electron in the ground state so that H-atom becomes H+ion). Determine the frequency of this em wave. In which region of the electromagnetic spectrum does this em wave lie?
The wavelength of the peak of the blackbody distribution was found to follow Wein’s Displacement Law. Calculate the peak wavelength of a bluish-white star that radiates at temperature 20000 K. a) 145 nm b) 100 nm c) 114 nm d) 155 nm
2. What is the mass of a photon with wavelength, 628nm (red light). What is the energy of the photon? What is the mass of a photon that has a zero velocity?
1. What is the wavelength associated with a 250g cricket ball moving at 100 km/h?
6. An object with a temperature of 5,000 K emits an electromagnetic (EM) flux of 50 nanowatt. Apply the blackbody radiation law to calculate approximate EM flux emitted by this body if its temperature is changed to 18,000 F.

	a.	they are formed by material falling into the galaxy.
	b.	they are powered by black body radiation.
	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 of high-speed matter in magnetic fields, which tend to emit photons in the direction they are moving.