Which mirror is used for shaving purpose?

Correct option is C

​The correct answer is (c) Concave

Explanation:

• Concave mirrors are used for shaving because they provide a magnified and upright image when the object (face) is placed within the focal length of the mirror.
• This helps in getting a closer and clearer view of the face, making shaving easier.

Information Booster:

Concave and Convex Mirrors

Concave Mirror (Converging Mirror)

• Nature of Reflection: Converges light rays at a focal point.
• Image Formation:
• Real & Inverted when the object is beyond the focal point.
• Virtual & Upright when the object is between the focus and the mirror.
• Uses:
• Shaving/makeup mirrors (magnified view).
• Headlights & torches (focuses light).
• Solar concentrators (concentrate sunlight).
• Dentist & ENT mirrors (magnified view of small areas).

Convex Mirror (Diverging Mirror)

• Nature of Reflection: Diverges light rays, making them appear to come from a focal point behind the mirror.
• Image Formation:
• Always Virtual, Upright & Diminished, regardless of object position.
• Uses:
• Rear-view mirrors in vehicles (wide-angle view).
• Surveillance & security mirrors (in shops, parking lots).
• Street light reflectors (spread light over a large area).

Both mirrors follow the mirror formula:

​$$\frac{1}{f} = \frac{1}{v} + \frac{1}{u}$$​​

where:

• f = focal length
• u = object distance
• v = image distance