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प्रश्न
What type of image is always made by a concave lens?
उत्तर
A concave lens always forms a virtual and erect image.
संबंधित प्रश्न
If the image formed by a lens for all positions of an object placed in front of it is always erect and diminished, what is the nature of this lens? Draw a ray diagram to justify your answer.
State whether concave lens has a real focus or a virtual focus.
If an object is placed 21 cm from a converging lens, the image formed is slightly smaller than the object. If the object is placed 19 cm from the lens, the image formed is slightly larger than object. The approximate focal length of the lens is ______.
How would you alter the above diagram to show how a converging lens can produce a beam of parallel rays of light.
A converging lens of focal length 5 cm is placed at a distance of 20 cm from a screen. How far from the lens should an object be placed so as to form its real image on the screen?
Give the position, size and nature of image of formed by a concave lens when the object is placed:
anywhere between optical centre and infinity.
An object is placed 10 cm from a lens of focal length 5 cm. Draw the ray diagrams to show the formation of image if the lens is converging,
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?
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.
The focal length of a lens is negative. In this case, state the kind of lens.
