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प्रश्न
Copy and complete the following ray diagram.
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उत्तर
संबंधित प्रश्न
A lens forms an erect, magnified and virtual image of an object. Draw a ray diagram to show the formation of image.
Draw a neat labelled ray diagram to show the formation of an image by a magnifying glass. State three characteristics of the image.
Define magnifying power of a simple microscope. How can it be increased?
What information about the nature of image is real or virtual, do you get from the sign of magnification + or -?
What are conjugate foci?
Name the lens used as a magnifying glass.
A convex lens produces on a screen an image twice the size of the object. If the position of image and object be interchanged, what will be the magnification then?
What is a magnifying glass (or a simple microscope)? Draw a ray diagram to show how a convex lens may be used as a magnifying glass. Where should the object be placed? State three characteristics of the image formed.
(i) Draw a ray diagram to show how the lens can be used as a ‘magnifying glass’? State the nature of the lens.
(ii) In what respect does the image in (i) above different from the image formed by a concave lens?
Write an expression for the magnifying power of a simple microscope. How can it be increased?
