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प्रश्न
Give two characteristic of the image formed by a concave lens.
उत्तर
Image formed by a concave lens is virtual and diminished.
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संबंधित प्रश्न
Define the principal focus of a concave lens.
Where must the object be placed for the image formed by a converging lens to be:
real, inverted and same size as the object?
List some things that concave lens and concave mirror have in common.
An illuminated object is placed at a distance of 20 cm from a converging lens of focal length 15 cm. The image obtained on the screen is:
(a) upright and magnified
(b) inverted and magnified
(c) inverted and diminished
(d) upright and diminished
A converging lens of focal length 5 cm is placed at a distance of 20 cm from a screen. How far from the lens should an object be placed so as to form its real image on the screen?
An object lies at a distance of 2f from a concave lens of focal length f. Draw a ray-diagram to illustrate the image formation.
State one practical use each of convex mirror, concave mirror, convex lens and concave lens.
State two applications of a concave lens.
How will you differentiate between a convex and a concave lens by looking at
- a distant object,
- a printed page?
Draw images in case of a concave lens when the object is at infinity.
