Define angle of dip. Deduce the relation connecting angle of dip and horizontal component of earth's magnetic field at a place.

Explanation

### Step-by-Step Solution

**Step 1: Define the Angle of Dip**
The angle of dip, denoted as \( \theta \), is defined as the angle that the direction of the total strength of the Earth's magnetic field makes with a horizontal line in the magnetic meridian.

**Step 2: Understand the Components of the Earth's Magnetic Field**
The Earth's magnetic field can be resolved into two components:
- The horizontal component (\( H \)), which acts parallel to the Earth's surface.
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