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प्रश्न
An image formed by a lens is erect. Such an image could be formed by a
विकल्प
convex lens provided the image is smaller than object.
concave lens provided the image is smaller than object.
concave lens provided the image is larger than object.
concave lens provided the image is of the same size.
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उत्तर
concave lens provided the image is smaller than object.
Explanation:
A concave lens provided the image is smaller than an object. The image of an object created by a concave lens is erect, virtual and diminished.
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संबंधित प्रश्न
An object is placed at a distance of 12 cm in front of a concave mirror of radius of curvature 30 cm. List four characteristics of the image formed by the mirror.
Fill in the following blank with suitable word:
The focal length of a concave mirror is the distance from the ......... to the mirror.
If an object is placed at the focus of a concave mirror, where is the image formed?
Name the type of mirror used by dentists. How does it help?
Write down a formula for the magnification produced by a concave mirror.
In terms of height of object and height of image.
A large concave mirror has a radius of curvature of 1.5 m. A person stands 10 m in front of the mirror. Where is the person's image?
An object is placed just outside the principal focus of concave mirror. Draw a ray diagram to show how the image is formed, and describe its size, position and nature.
Between which two points of concave mirror should an object be placed to obtain a magnification of:
(a) −3
(b) +25
(c) −0.4
Explain the images formed by a concave mirror.
Pick out the concave and convex mirrors from the following and tabulate them.
Rear-view mirror, Dentist’s mirror, Torchlight mirror, Mirrors in shopping malls, Make-up mirror.
