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प्रश्न
A student determines the focal length of a device 'X' by focusing the image of a distant object on a screen placed 20 cm from the device on the same side as the object. The device 'X' is
(a) Concave lens of focal length 10 cm
(b) Convex lens of focal length 20 cm
(c) Concave mirror of focal length 10 cm
(d) Concave mirror of focal length 20 cm
उत्तर
In case of concave mirror, the image will be formed on the same side on the screen at its focus point when object is distant.
Hence, the correct answer is option (d).
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संबंधित प्रश्न
The image formed by a concave mirror is observed to be virtual, erect and larger than the object. Where should be the position of the object?
For what position of an object, a concave mirror forms a real image equal in size to the object?
Copy this figure in your answer book and show the direction of the light ray after reflection:
Which type of mirror is used in a solar furnace? Support your answer with reason.
The image formed by a concave mirror is real, inverted and highly diminished (much smaller than the object). The object must be:
(a) between pole and focus
(b) at focus
(c) at the centre of curvature
(d) at infinity
According to the "New Cartesian Singh Convention" for mirrors, what sign has been given to the focal length of:
a concave mirror?
A convex mirror is used as a shaving mirror.
The image formed by a concave mirror is of the same size as the object, if the object is placed
In which equipment/s do you find ___________________
Under which of the following conditions a concave mirror can form an image larger than the actual object?
