The correct option is (c).
Explanation
Spherical mirrors are mirrors whose reflecting surfaces are parts of a hollow sphere of glass. The classification of these mirrors into concave or convex depends on which side of the spherical section acts as the reflecting surface.
Statement-wise Analysis:
- Statement 1 is Correct: A spherical mirror whose reflecting surface is curved inwards, that is, it faces towards the centre of the sphere, is called a concave mirror. Conversely, if the reflecting surface is curved outwards, it is called a convex mirror.
- Statement 2 is Incorrect: The curved surface of a shining spoon can be considered as a curved mirror. The inner surface of a spoon acts as a concave mirror because it curves inwards. The outer surface of a spoon bulges outwards and acts as a convex mirror.
- Statement 3 is Correct: If a hollow rubber ball is cut, the inner surface of the cut portion is curved inwards. This geometry represents a concave surface. If this inner surface were reflective, it would function as a concave mirror.
Key Takeaway:
In spherical mirrors, a reflecting surface that curves inwards (like a cave) is concave, while a reflecting surface that bulges outwards is convex.