Which of the following mirrors is used as a shaving mirror to get a magnified image of the face?
Shaving Mirror Magnification Explained
A shaving mirror is specifically designed to provide a magnified view of the user's face. This magnification allows for easier and more precise shaving.
Mirror Type Analysis
Let's analyze the properties of different mirrors concerning image formation:
- Plane Mirror: Forms a virtual, erect image of the same size as the object. It does not magnify.
- Convex Mirror: Forms a virtual, erect, and diminished image. It provides a wider field of view but does not magnify the object.
- Concave Mirror: Depending on the object's position, a concave mirror can form different types of images. When the object (face) is placed between the pole (P) and the principal focus (F), the concave mirror forms a virtual, erect, and magnified image. This is ideal for a shaving mirror.
- Parabolic Mirror: While similar in focusing properties to concave mirrors, the specific application of a shaving mirror relies on the magnification properties typically associated with a standard concave mirror.
Conclusion on Mirror Choice
To achieve the necessary magnification for shaving, a concave mirror is the appropriate choice. It provides an enlarged, erect image of the face when held at a suitable distance (closer than its focal length).
Important Questions from Mirrors and Images
- Which of the following statements correctly describes the nature and position of the image formed by a convex mirror when a real object is placed at any position in front of it?
- A beam of parallel light, originating from a distant source, is first incident on a convex lens with focal length $f_2$.
Subsequently, the light passes through the lens and then reflects from a concave mirror having a focal length $f_1$.
The concave mirror is placed at a distance $d$ from the convex lens.
For the light rays to retrace their original path and ultimately emerge from the lens as a parallel beam heading back towards the distant source, the separation distance $d$ between the lens and the mirror must be: The total number of images formed by two mirrors inclined at 72° to each other when the object is placed unsymmetrically will be ___?
A short linear object of length b lies along the axis of a concave mirror of focal length f at a distance u from the pole of the mirror. The size of the image is ;
- A concave mirror of focal length $f$ produces an image $n$ times the size of the object. If the image is virtual, then the distance of the object from the mirror is:
