What two things are unusual about the luminosity of the core of a ...

[tichca]

What two things are unusual about the luminosity of the core of a Seyfert galaxy?
 
  What will be an ideal response?

Question 2

What physical situation is necessary to create an absorption spectrum?
 
  What will be an ideal response?

[Bigfoot1984]

Answer to Question 1

The core of a Seyfert galaxy is extremely luminous. The luminosity of the core fluctuates quickly and randomly.

Answer to Question 2

Blackbody radiation creates a continuous spectrum of photons at different wavelengths. When these photons pass through a cool gas, some are absorbed as they excite atoms in the gas. An observer on the other side then sees a continuum of photons with gaps at certain wavelengths - an absorption spectrum.

[tichca]

Excellent

[emsimon14]

Thanks for the timely response, appreciate it