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Define principal axis of a spherical mir...

Define principal axis of a spherical mirror.

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**Step-by-Step Text Solution:** 1. **Understanding Spherical Mirrors**: Spherical mirrors are mirrors that have the shape of a section of a sphere. They can be either concave (curving inward) or convex (curving outward). 2. **Identifying Key Points**: In a spherical mirror, there are key points to consider: - **Pole (P)**: This is the central point of the mirror's surface. - **Center of Curvature (C)**: This is the center of the sphere from which the mirror is a part. ...
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