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प्रश्न
Study the diagram given 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 the three characteristics of the image.
- Name a device in which this action of lens is used.
उत्तर
- LL' lens is a convex lens.
- O and O' are known as first and second focal points respectively.
- Three characteristics of image are
- Image is virtual
- Erect
- Magnified
- Such action of lens is used in a magnifying glass or a simple microscope.
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संबंधित प्रश्न
Where should an object be placed so that a real and inverted image of the same size as the object is obtained using a convex lens?
What type of lens would you use as a magnifying glass? How close must the object be to the lens?
Define principal axis, principal focus and focal length of a convex lens.
What would be the diameter of the image of the flower on the film?
A lens always forms an image between the object and the lens.
A lens always forms an image between the object and the lens.
State the position of object, position of image, nature of image when: Convex lens is used as in searchlight.
: Object near the lens : : ______ : 
Find the odd one out and give its explanation.
A convex lens of focal length 20 cm can produce a magnified virtual as well as real image. Is this a correct statement? If yes, where shall the object be placed in each case for obtaining these images?
Distinguish between:
Concave lens and Convex Lens
