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प्रश्न
An erect, magnified, and a virtual image is formed when an object is placed between the optical centre and principal focus of a lens.
(i) Name the lens.
(ii) Draw a ray diagram to show the formation of the image with the above-stated characteristics.
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उत्तर
(i) The lens is convex.
(ii)
संबंधित प्रश्न
The speed of light in air is 3 × 108 m s-1. Calculate the speed of light in glass. The refractive index of glass is 1.5
A lens forms an erect, magnified, and virtual image of an object. Name the device which uses this principle.
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?
Define the term magnifying power of a simple microscope. How does it depend on the focal length of the lens used?
Name the lens used as a magnifying glass.
Will the image formed by a magnifying glass be real or virtual?
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?
(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?
