Quasar ________ lines are an indication of intervening cooler gas

Fill in the blank(s) with correct word


absorption

Physics & Space Science

You might also like to view...

Betelgeuse is the bright red star representing the left shoulder of the constellation Orion. All the following statements about Betelgeuse are true. Which one can you infer from its red color?

A) It is moving away from us. B) Its surface is cooler than the surface of the Sun. C) It is much more massive than the Sun. D) It is much brighter than the Sun.

Physics & Space Science

What is the maximum kinetic energy (in eV) of a photoelectron when a surface, whose work function is 5.0 eV, is illuminated by photons whose wavelength is 400 nm?

a. 3.1 b. ?1.9 c. 1.9 d. 0 e. 1.2

Physics & Space Science

Following selection rules for multi-electron atoms, imagine a titanium atom in the ground state with two electrons in each of the 3d and 4s shells. In the 3d shell, which of the following scenarios is least likely to be true?

a. The electrons orbital angular momentum is aligned. b. The electrons' spins are antialigned to minimize energy. c. The spin and angular momentum of the electrons are aligned to minimize energy. d. The energy levels of the electrons are split due to LS coupling. e. The magnetic quantum numbers of the electrons are either both positive or both negative.

Physics & Space Science

A person runs up a long flight of stairs in 10 seconds. If the person's weight is 600 N and the vertical height of the stairs is 20 meters, what is the person's power output?

Physics & Space Science