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प्रश्न
A point light source is kept in front of a convex mirror at a distance of 40 cm. The focal length of the mirror is 40 cm. Find the position of image.
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उत्तर
Given,
u = 40 cm (negative)
f = 40 cm (positive)
Mirror formula:
`1/u + 1/v = 1/f`
Substituting the values in the formula above, we get,
`- 1/40 + 1/v = 1/40`
`1/v = 1/40 + 1/40`
`1/v = (1 + 1)/40`
`1/v = 2/40`
`1/v = 1/20`
⇒ v = 20 cm.
The image is behind the mirror at a distance 20 cm.
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संबंधित प्रश्न
Name the spherical mirror which can produce a real and diminished image of an object.
A 2.0 cm tall object is placed 40 cm from a diverging lens of focal length 15 cm. Find the position and size of the image.
(a) When a concave mirror is used as a shaving mirror, where is the person's face in relation to the focus of mirror?
(b) State three characteristics of the image seen in part (a).
Define the following term in relation to concave mirror.
Radius of curvature
AB is the object, A1B1 is its image. MM' is the position of the mirror. Complete the ray diagram and find the position of the center of curvature and focus of the mirror. Also, measure the focal length.
Which of the following has curved reflecting surface?
Define the following terms in the context of a diverging mirror:
- Principal focus
- Focal length
Draw a labelled ray diagram to illustrate your answer.
