Light emitted from a distant star is observed at frequency 5000 MHz for the star stationary with respect to us. If the star starts approaching us with speed `6xx10^(5)m//s`. Then the observed frequency will be

Explanation

To solve the problem, we will use the Doppler effect formula for light waves. The Doppler effect describes the change in frequency or wavelength of light from a source moving relative to an observer.

### Step-by-Step Solution:

1. **Identify Given Values:**
- Stationary frequency of the star, \( f = 5000 \, \text{MHz} = 5000 \times 10^6 \, \text{Hz} \)
- Speed of the star approaching us, \( v = 6 \times 10^5 \, \text{m/s} \)
- Speed of light, \( c = 3 \times 10^8 \, \text{m/s} \)
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