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प्रश्न
Convex lens : converging : : concave lens : _______
उत्तर
Convex lens : converging : : concave lens : diverging
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संबंधित प्रश्न
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
Draw a diagram to show how a converging lens focusses parallel rays of light?
How would you alter the above diagram to show how a converging lens can produce a beam of parallel rays of light.
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.
Which type of lens is :
a converging lens, and which is
How would a pencil look like if you saw it through
a concave lens Is the image real or virtual?
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 A?
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 nature of lens A?
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.
A concave lens of 20 cm focal length forms an image 15 cm from the lens. Compute the object distance.
An object is placed on the axis of a lens. An image is formed by refraction in the lens. For all positions of the object on the axis of the lens, the positions of the image are always always between the lens and the object name the lens.
A lens forms an image between the object and the lens. Name the lens.
In figure give below of thin concave lens, F1 and F2 are its foci, complete the path of the given ray of light after it emerges out of the lens.
Define the principal focus of a concave lens.
Draw images in case of a concave lens when the object is at infinity.
Draw images in case of a concave lens when the object is at any point on the principal axis between the lens and infinity.
The focal length of a lens is negative. In this case, state the kind of lens.
