A plane electromagnetic wave of frequency `25` MHz travels in free space along the x-direction. At a particular point in space and time, `vec(E)=6.3hat(j)V//m`. What is B at this point ?

Explanation

To find the magnetic field \( \vec{B} \) at the given point for the electromagnetic wave, we can follow these steps:

### Step 1: Identify the Given Values
- Frequency \( f = 25 \) MHz \( = 25 \times 10^6 \) Hz
- Electric field \( \vec{E} = 6.3 \hat{j} \) V/m

### Step 2: Calculate the Speed of Light
The speed of light in free space is given by:
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