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प्रश्न
The image formed by a concave mirror is of the same size as the object, if the object is placed
पर्याय
at the focus
between the pole and focus
between the focus and centre of curvature
at the centre of curvature.
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उत्तर
at the centre of curvature.
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संबंधित प्रश्न
With the help of an appropriate ray diagram, state the sign conventions for reflection by a spherical mirror.
Draw the following diagram in your answer book and show the formation of image with the help of suitable rays:
With the help of a labelled ray diagram, describe how a converging mirror can be used to give an enlarged upright image of an object.
An object is 100 mm in front of a concave mirror which produces an upright (erect image). The radius of curvature of the mirror is ______.
An object of 5.0 cm size is placed at a distance of 20.0 cm from a converging mirror of focal length 15.0 cm. At what distance from the mirror should a screen be placed to get the sharp image? Also calculate the size of the image.
If a concave mirror has a focal length of 10 cm, find the two positions where an object can be placed to give, in each case, an image twice the height of the object.
An object is placed 15 cm from (a) a converging mirror, and (b) a diverging mirror, of radius of curvature 20 cm. Calculate the image position and magnification in each case.
With the help of a labelled diagram, explain how a concave lens diverges a beam of parallel light rays. Mark the principal axis, optical centre, principal focus and focal length of the concave lens on the diagram.
Which of the following ray diagrams is correct for the ray of light incident on a concave mirror as shown in figure?
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| A | B | C | D |
The concave reflecting surface of a torch got rusted. What effect would this have on the beam of light from the torch?
