Chapter 26, Problem 80RPP

To determine

The option which is the closest to the speed of light being emitted from the quasar $3\text{C 273}$ measured by an observer on Earth, from the given options, when the quasar is receding from Earth at a speed of about $0.16\text{c}$, the distance between the Sun and Earth is $1.5\times {10}^{11}\text{ m}$, the Sun emits the energy at a rate of $3.8\times {10}^{26}\text{ J/s}$ by converting $4.3\times {10}^9\text{ kg/s}$ of mass into light, the $3\text{C 273}$ quasar emits the radiation with the power of $2\times {10}^{13}\text{ Suns}$, the mass of Earth is $6\times {10}^{24}\text{ kg}$, and the value of Hubble’s constant is $70.8\frac{\text{km/s}}{\text{Mpc}}$:

a. $1.15\text{c}$

b. $\text{c}$

c. $\text{0}\text{.85c}$

d. None of these is correct