This question asks about the number of images formed when two plane mirrors are placed parallel to each other. This is a classic optics problem involving multiple reflections.
Correct Option: C) Infinite. When two plane mirrors are placed parallel to each other, light rays from an object between them undergo multiple reflections, with each image formed by one mirror acting as a virtual object for the other. This process continues indefinitely, leading to the formation of an infinite number of images.
This question asks about the relationship between the focal length (\(f\)) and the radius of curvature (\(R\)) of a concave mirror. This is a fundamental concept in geometrical optics.
Correct Option: C) f = R/2
This question tests basic knowledge about types of mirrors and their properties, specifically how they affect light rays. We need to recall the behavior of light when it strikes a concave mirror.
Correct Option: A) Converging mirror
A concave mirror is known as a converging mirror because it converges (brings together) parallel rays of light after reflection.
The question asks about the characteristics of the image formed by a convex mirror. We need to recall the properties of images formed by convex mirrors based on ray diagrams or mirror formulas.
C) Virtual, erect, and diminished. This option correctly describes all the characteristics of the image formed by a convex mirror.
The question asks about the type of mirror used as a rear-view mirror in vehicles. This requires understanding the properties of different types of mirrors and how they are applied in practical situations like vehicles.
D) Convex mirror — Convex mirrors are chosen for rear-view mirrors because they provide a wider field of view and always form an erect, diminished image of objects. This allows the driver to see a larger area behind the vehicle, enhancing safety, even though objects appear farther away than they actually are.
The question asks about the type of mirror dentists use to examine teeth. This requires understanding the properties of different types of mirrors, specifically how they form images, and which property would be beneficial for dental examination.
Correct Option: D) A concave mirror is used by dentists because it produces a magnified, erect, and virtual image when the object (tooth) is placed between the pole and the principal focus of the mirror. This magnification helps the dentist to see the teeth more clearly and detect problems.