What is the shape of the wavefront on earth for sunlight ?

Explanation

To determine the shape of the wavefront on Earth for sunlight, we can follow these steps:

### Step 1: Understand the Source of Light
The Sun emits light that travels through space to reach Earth. The distance between the Sun and Earth is approximately 148 million kilometers.

**Hint:** Consider the nature of the light source and its distance from the observer.

### Step 2: Consider the Distance
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