A star far away is moving away from Earth at a speed of $1.40 \times 10^{7}\,\text{m s}^{-1}$. It gives out light with a frequency of $4.57 \times 10^{14}\,\text{Hz}$. The speed of light is $3.00 \times 10^{8}\,\text{m s}^{-1}$. The Doppler effect formula may be applied to light waves. What frequency will this light have when it is observed on Earth?
- A$2.04 \times 10^{13}\,\text{Hz}$
- B$4.37 \times 10^{14}\,\text{Hz}$
- C$4.57 \times 10^{14}\,\text{Hz}$
- D$4.79 \times 10^{14}\,\text{Hz}$