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प्रश्न
When an object of height 1 cm is kept at a distance 4 cm from a concave mirror, its erect image of height 1.5 cm is formed at a distance 6 cm behind the mirror. Find the focal length of mirror, by drawing.
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उत्तर
A ray passing parallel to the principal axis passes through the focal point after reflection. Hence, the focal length is 12 cm.
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संबंधित प्रश्न
Define Radius of curvature of the spherical mirror
Name the two types of spherical mirrors. What type of mirror is represented by the:
back side of a shining steel spoon?
Explain the following terms :
Pole, Centre of curvature, Radius of curvature, Principal axis. Show them on separate diagrams for each of the concave and convex mirrors.
What do you understand by the focus and focal length of a spherical mirror? Show them on the separate diagrams for each of a concave mirror and a convex mirror.
Figure shows a concave mirror with its pole at P, focus F and centre of curvature C. Draw ray diagram to show the formation of image of an object OA.
The diagram below in Figure, shows a convex mirror. C is its centre of curvature and F is its focus. (i) Draw two rays from A and hence locate the position of image of object OA. Label the image IB. (ii) State three characteristics of the image.
Define the term Centre of curvature.
Draw a ray diagram to show that a convex mirror has a wider field of view.
A student traces the path of a ray of light passing through a rectangular slab.
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For measuring the angle of incidence, he must position the protractor in the manner shown in the figure:
A spherical mirror whose reflecting surface is curved outwards is called ______ mirror.
