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प्रश्न
When an object is kept at any distance in front of a concave lens, the image formed is always:
(a) virtual, erect and magnified
(b) virtual, inverted and diminished.
(c) virtual, erect and diminished
(d) virtual, erect and same size as object
उत्तर
virtual, erect and diminished
A concave lens always forms a virtual, erect and diminished image.
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संबंधित प्रश्न
Show by drawing a ray-diagram that the image of an object formed by a concave lens is virtual, erect and diminished.
A beam of light is incident through the holes on one side of a box and emerges out through the holes on its opposite side as shown in the following figure:
The box contains:
(a) a glass prism
(b) a concave lens
(c) a convex lens
(d) a parallel-sided glass slab
The power of a concave lens is 10 D and that of a convex lens is 6 D. When these two lenses are placed in contact with each other, the power of their combination will be :
(a) +16 D
(b) +4 D
(c) −16 D
(d) −4 D
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myopia?
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(i) Name the type of lens which forms the above image.
(ii) Draw a ray diagram to show the formation of the image with the above stated characteristics.
Draw images in case of a concave lens when the object is at infinity.
The focal length of a lens is negative. In this case, state the kind of lens.
