Question

Draw a ray diagram in order to obtain a virtual image of an object by a concave mirror. Write down any one use of this mirror.

Answer 1

Ray Diagram — Virtual Image by a Concave Mirror

A
virtual and erect image is obtained when the object is placed
between the pole (P) and the
focus (F) of a concave mirror. The reflected rays appear to diverge from a point behind the mirror, forming a magnified image.

Image Characteristics

• Nature: Virtual and Erect
• Size: Magnified
• Position: Behind the mirror

Mirror Formula (for reference)

The relationship between object distance \( u \), image distance \( v \), and focal length \( f \) is:

\[ \frac{1}{f} = \frac{1}{u} + \frac{1}{v} \]

Use of Concave Mirror:

Concave mirrors are used by
dentists to obtain a
magnified image of the teeth. This helps them examine small cavities or defects clearly.