Answer:
e. 1944.4; redshift
Explanation:
The hydrogen Balmer line Hβ has a wavelength of 486.1 nm in the laboratory. It is observed in a quasar at 2430.5 nm. What is the change in wavelength (in nm) of this quasar? Is it a "redshift" or "blueshift"?
a. 0; no change
b. 2430.5; redshift
c. 486.1; blue shift
d. 1944.4; blueshift
e. 1944.4; redshift
Solution
wavelength is the distance between two successive crest or the difference between two successive trough.
it is also the ratio between velocity and frequency
difference in wavelength=[tex]\alpha 2-\alpha 1[/tex]
2430.5 nm-486.1 nm=
1944.4; redshift
When an object moves away from us, the light is tilted to the red end of the spectrum(combination of seven colours), as its wavelengths get longer
