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प्रश्न
Which type of lens forms always a virtual image?
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उत्तर
A concave lens always forms a virtual image of an object.
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संबंधित प्रश्न
Define focal length of a divergent lens.
An image formed by a concave ______ cannot be obtained on a screen.
A real image cannot be obtained on a screen.
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Explain why, a stick half immersed in water appears to be bent at the surface. Draw a labelled diagram to illustrate your answer.
Write the new Cartesian sign convention for spherical lenses.
Two lenses A and B have power of (i) +2D and (ii) −4D respectively. What is the nature and focal length of each lens?
What are the three principal rays that are drawn to construct the ray diagram for the image formed by a lens? Draw diagrams to support your answer.
Complete the ray diagram to show how the rays pass into and out of the lens?
Which diagram shows image formation of an object on a screen by a converging lens?
