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प्रश्न
The diverging lens in part (a) is replaced by a converging lens also of focal length 100 mm. The object remains in the same position and an image is formed by the converging lens. Compare two properties of this image with those of the image formed by the diverging lens in part (a).
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उत्तर
| S.No | Image formed by a diverging lens | Image formed by a converging lens |
| 1 | Image formed is virtual and erect | Image formed is real and inverted |
| 2 | Image is smaller in size than the object | Image is larger in size than the object |
संबंधित प्रश्न
When a spherical mirror is held towards the sun and its sharp image is formed on a piece of a carbon paper for some time, a hole is burnt in the carbon paper.
Why is a hole burnt in the carbon paper?
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- State whether this spherical mirror will diverge or converge light rays.
A lens forms a real image 3 cm high of an object 1 cm high. If the separation of object and image is 15 cm, find the focal length of the lens.
What is a spherical mirror?
What do you understand by the focus and focal length of a spherical mirror? Show them on the separate diagrams for each of a concave mirror and a convex mirror.
Name the kind of mirror used to obtain:
A virtual and diminished image
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The erect image formed by a concave mirror is of size double the size of object. How are u and v related?
A point light source is kept in front of a convex mirror at a distance of 40 cm. The focal length of the mirror is 40 cm. Find the position of image.
A straight stick partly dipped in water obliquely appears to be bent at the surface of the water.
Draw a ray diagram to show the formation of the image, when the object is placed between optical centre and principal focus of a convex lens.
State the signs and values of magnifications in the above mentioned case.
Select the correct option:
Looking into a mirror one finds her image diminished, the mirror is:
Size of image of an object by a mirror having a focal length of 20 cm is observed to be reduced to 1/3rd of its size. At what distance the object has been placed from the mirror? What is the nature of the image and the mirror?
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What is “aperture”?
