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प्रश्न
How would a pencil look like if you saw it through
a concave lens Is the image real or virtual?
उत्तर
When a pencil is seen through a concave lens placed close to it, it appears smaller than it's actual size. Because a concave lens always produces a virtual image, the image formed is virtual.
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संबंधित प्रश्न
Where must the object be placed for the image formed by a converging lens to be:
virtual, upright and larger than the object?
How would you alter the above diagram to show how a converging lens can produce a beam of parallel rays of light.
Copy and complete the diagram below to show what happens to the rays of light when they pass through the concave lens:
Which type of lenses are:
thinner in the middle than at the edges?
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
When an object is placed 10 cm in front of lens A, the image is real, inverted, magnified and formed at a great distance. When the same object is placed 10 cm in front of lens B, the image formed is real, inverted and same size as the object.
What is the focal length of lens B?
An object 60 cm from a lens gives a virtual image at a distance of 20 cm in front of the lens. What is the focal length of the lens? Is the lens converging or diverging? Give reasons for your answer.
What kind of lens is used to correct
short-sightedness
A lens forms an image between the object and the lens. Name the lens.
