Author Question: The hydrogen Balmer line H has a wavelength of 486.1 nm in the laboratory. It is observed in a ... (Read 103 times)

Themember4 · **on:** Jul 27, 2018

The hydrogen Balmer line H has a wavelength of 486.1 nm in the laboratory. It is observed in a quasar at 2430.5 nm. What is the fractional change in wavelength or redshift z of this quasar?

a. 5
b. 0.5
c. 0.25
d. 4
e. 1944.4

Question 2

The Algol paradox is explained by considering

a. the degenerate nature of the hydrogen on the surface of the white dwarf.
b. synchrotron radiation.
c. the rate of expansion of the shock wave inside the supernova.
d. the rotation rate of a neutron star.
e. mass transfer between the two stars in a binary system.