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प्रश्न
Object at 2F1 of a convex lens : Image at 2F2 : : Object at F1 : _______
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उत्तर
Object at 2F1 of a convex lens : Image at 2F2 : : Object at F1 : Image at infinity
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संबंधित प्रश्न
Draw a ray diagram to show the formation of the image of an object be placed so that a real and inverted image of the same size as the object is obtained using a convex lens
A ray of light travelling in air is incident on a parallel-sided glass slab (or rectangular glass slab). Draw a ray-diagram indicating the change in its path in glass.
Draw a labelled ray diagram to show how a ray of light is refracted when it passes:
from air into an optically denser medium.
Draw a labelled ray diagram to show how a ray of light passes through a parallel-sided glass block if it hits the glass block at 90° (that is, perpendicular to the glass block).
Name one simple optical instrument in which the above arrangement of convex lens is used.
A convex lens has a focal length of 10 cm. At which of the following positions should an object be placed so that this convex lens may act as a magnifying glass?
A burning candle whose flame is 1.5 cm tall is placed at a certain distance in front of a convex lens. An image of candle flame is received on a white screen kept behind the lens. The image of flame also measures 1.5 cm. If f is the focal length of convex lens, the candle is placed:
(a) at f
(b) between f and 2f
(c) at 2f
(d) beyond 2f
Which causes more bending (or more refraction) of light rays passing through it : a convex lens of long focal length or a convex lens of short focal length?
A convex lens forms an image of an object equal to the size of the object. Draw a diagram to illustrate it.
For which position of the object does a convex lens form a virtual and erect image? Explain with the help of a ray diagram.
Distinguish between:
Concave lens and Convex lens
Where must a point source of light be placed in front of a convex lens so as to obtain a parallel beam of light?
State the position of object, position of image, nature of image when: Convex lens is used as an erecting lens in terrestrial telescope.
An object is placed in front of a convex lens such that the image formed has the same size as that of the object. Draw a ray diagram to illustrate this.
We can burn a piece of paper by focussing the sun rays by using a particular type of lens. Name the type of lens used for the above purpose. Draw a ray diagram to support your answer.
Simple microscope : Number of convex lens one : : compound microscope : _______
Which of the following statements is true?
Distinguish between:
Concave lens and Convex Lens
