Astronomers who discovered quasars found that they show ___________ of their spectral lines and are thus probably much ___________ than nearby galaxies
a. large redshifts; farther away
b. large blueshifts; farther away
c. no wavelength difference; nearer
d. large redshifts; nearer
e. large blueshift; nearer
a
You might also like to view...
Of the possible statements that parallel rays are brought to a focus by a 1)concave mirror,2)convex mirror,3)converging lens,4)diverging lens,the correct answer is
A. 1 and 2. B. 3 and 4. C. 1 and 3. D. 2 and 3. E. 2 and 4.
When the equation Al + O2? Al2O3 is balanced, the coefficient of Al is
a. 1 b. 2 c. 3 d. 4
Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t. You carry a 20 N box 5 m horizontally across a room. The work you do is __________
Fill in the blank(s) with correct word
The energy of the ground state in the Bohr model of the hydrogen atom is -13.6 eV. The energy of the n = 2 state of hydrogen in this model is closest to
A) -4.5 eV. B) -6.8 eV. C) -1.7 eV. D) -13.6 eV. E) -3.4 eV.