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प्रश्न
A point object is placed at O in front of a glass sphere as shown in figure.
Show the formation of the image by the sphere.
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उत्तर
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संबंधित प्रश्न
Calculate the focal length of a corrective lens having power +2D.
State the power of a lens S.I. unit.
A convex lens forms a real and inverted image of a needle at a distance of 50 cm from it. Where is the needle placed in front of the convex lens if the image is equal to the size of the object? Also, find the power of the lens.
Two lenses A and B have focal lengths of +20 cm and, −10 cm, respectively.
(a) What is the nature of lens A and lens B?
(b) What is the power of lens A and lens B?
(c) What is the power of combination if lenses A and B are held close together?
How is the sign (+ or -) of power of a lens related to its divergent or convergent action?
The power of a lens is + 1.0 D is :
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