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
What type of mirror is used in the headlights of vehicles?
- A concave mirror forms a real and inverted image of a distant object at a distance of $15 \text{ cm}$ from the mirror.
If an object is placed $20 \text{ cm}$ in front of this mirror, what will be the nature and magnification of the image formed? The number of images observable between two parallel mirror is
An object is placed at a distance of \(\frac{f}{2}\) from a convex lens. The image will be
Which of the following pair is correct?
I. Mirror formula : (1/v) – (1/u) = (1/f)
II. Lens formula : (1/v) + (1/u) = (1/f)
