An object is placed at a distance of 30cm in front of a convex mirror of focal length 15cm. Write four characteristics of the image formed by the mirror.
CBSE DELHI - SET 1 2017
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Formula related to focal length f, object-to-mirror distance u and image-to-mirror distance v is given by$\frac{1}{\text{v}}+\frac{1}{\text{u}}=\frac{1}{\text{f}}$
$\frac{1}{30}+\frac{1}{\text{v}}=\frac{1}{15}$
Solving the above e.q. for v, we get v = 30cm
$\frac{1}{30}+\frac{1}{\text{v}}=\frac{1}{15}$
Solving the above e.q. for v, we get v = 30cm
- Image is formed at a distance 30 cm from concave mirror.
- Since image distance and object distance are same (both are at 2F),
- Magnification = 1
- Image and object are same size.
- Image is real.
- Image is inverted.
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