Brief explanation: Mirror X is a concave mirror used to concentrate sunlight — for parallel rays from the Sun it forms a real, highly diminished image at the principal focus. Mirror Y is a convex (rear-view) mirror — it always gives a virtual, diminished, erect image. When an object is placed in front of a concave mirror , the mirror reflects the light rays and converges them to a point called the focal point. This forms a real or virtual image, depending on the position of the object relative to the focal point. A concave mirror is an object that reflects the light in the same angle as it receives from the object. Also, the angle of incident is equal to the angle of reflection in a mirror . Besides, the reflected light is of the same intensity as the light projected. Concave mirrors: These mirrors have a surface that curves inward like inside of a spoon. They can form both real and virtual images, depending on the distance of the object from the mirror and the curvature of the mirror . Concave mirrors are used in telescopes, headlights, and makeup mirrors.
