If the amplitude of waves at a distance `r` from line source is `A`. The amplitude at a distance `4r` will be

Options

A. `2A`
B. `A`
C. `A//2`
D. `A//4`

Explanation

To solve the problem of finding the amplitude of waves at a distance of \(4r\) from a line source, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Relationship Between Amplitude and Distance**:
- The amplitude of waves from a line source decreases with distance. The relationship can be expressed as:
\[
A \propto \frac{1}{r}
...