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प्रश्न
Give two characteristics of the image formed by a concave lens.
उत्तर
Two characteristics of image are
- It is always virtual and upright (ERECT).
- It is always diminished.
संबंधित प्रश्न
Define the principal focus of a concave lens.
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 ______.
Name one of the common defects of vision and the type of lens used to remove it.
State whether the following statement is true or false:
Short-sightedness can be cured by using a concave lens.
Study the diagram below.
- Name the lens LL’.
- What are the points O and O' called ?
- Complete the diagram to form the image of the object AB.
- State three characteristics of the image.
Where will the image be formed if an object is kept in front of a concave lens at a distance equal to its focal length? Draw a ray diagram to illustrate your answer.
The power of a lens is negative. State whether it is convex or concave.
When an object is kept within the focus of a concave mirror, an enlarged image is formed behind the mirror. This image is :
Draw images in case of a concave lens when the object is at infinity.
