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=
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
Answer:d
Explanation:
Suppose V is the voltage of battery and R is the resistance of bulb
so Power drop for initial stage
When another identical bulb of same resistance is applied in parallel so voltage Drop across both the resistor will be same i.e. V
so Power consumed
so there is no change in power and hence no dip in brightness