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प्रश्न
State three characteristics of the image of an extended source, formed by a concave lens.
उत्तर
Virtual, upright, and diminished.
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संबंधित प्रश्न
Define the principal focus of a concave lens.
Draw a diagram to show how a converging lens focusses parallel rays of light?
Give the position, size and nature of image of formed by a concave lens when the object is placed:
at infinity.
When sunlight is concentrated on a piece of paper by a spherical mirror or lens, then a hole can be burnt in it. For doing this, the paper must be placed at he focus of:
(a) either a convex mirror or convex lens
(b) either a concave mirror or concave lens
(c) either a concave mirror or convex lens
(d) either a convex mirror or concave lens
Name one of the common defects of vision and the type of lens used to remove it.
A concave lens forms the image of an object which is ______.
At what distance from a concave lens of focal length 20 cm a 6 cm tall object be placed so as to obtain its image at 15 cm from the lens? Also calculate the size of the image formed.
Draw a ray diagram to justify your answer for the above situation and label it.
Distinguish between Concave lens and Convex Lens.
Give two characteristics of the image formed by a concave lens.
A parallel, oblique beam of light falls on a concave lens. Draw a diagram to show refraction of light through the lens.
