Image Formation by Spherical Mirrors (Ray Diagrams)

# Image Formation by Spherical Mirrors (Ray Diagrams) Video Lecture | Physics Class 12 - NEET

## Physics Class 12

105 videos|425 docs|114 tests

## FAQs on Image Formation by Spherical Mirrors (Ray Diagrams) Video Lecture - Physics Class 12 - NEET

 1. What is a spherical mirror and how does it form an image?
Ans. A spherical mirror is a curved mirror with a reflective surface either on the inside (concave mirror) or on the outside (convex mirror). When light rays from an object pass through a spherical mirror, they are reflected and converge or diverge to form an image. The position, size, and nature (real or virtual) of the image depend on the type of mirror and the object's position relative to the mirror.
 2. What are the differences between concave and convex mirrors in terms of image formation?
Ans. Concave mirrors are converging mirrors that can form both real and virtual images. Real images are formed when the object is located beyond the focal point, and virtual images are formed when the object is located within the focal point. On the other hand, convex mirrors are diverging mirrors that can only form virtual, smaller, and upright images regardless of the object's position.
 3. How can a ray diagram be used to determine the characteristics of an image formed by a spherical mirror?
Ans. A ray diagram is a graphical representation of light rays and their paths as they interact with a spherical mirror. By drawing at least two incident rays from an object, such as the central ray and the ray passing through the focal point, their reflections can be traced to determine where they intersect. The point of intersection represents the position and nature (real or virtual) of the image, while the size and orientation can be determined by measuring distances and angles on the diagram.
 4. What is the difference between a principal axis and a focal point in a spherical mirror?
Ans. The principal axis is an imaginary line passing through the center of curvature, the vertex (center) of the mirror, and the focal point. It serves as the reference line for constructing a ray diagram. The focal point, on the other hand, is the point on the principal axis where parallel incident rays converge or appear to diverge after reflection. It is different for concave and convex mirrors, and its position determines the characteristics of the image formed.
 5. Can a concave mirror form a virtual image? Explain.
Ans. Yes, a concave mirror can form a virtual image. When the object is located within the focal point of a concave mirror, the reflected rays appear to diverge as if they originated from a point behind the mirror. This virtual image is formed on the same side as the object and is always upright, smaller than the object, and located between the focal point and the mirror.

## Physics Class 12

105 videos|425 docs|114 tests

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