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प्रश्न
If the focal length of a spherical mirror is 10 cm, what is the value of its radius of curvature?
विकल्प
10 cm
5 cm
20 cm
15 cm
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उत्तर
20 cm
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संबंधित प्रश्न
A student focused the Sun rays using an optical device 'X' on a screen S as shown.
From this it may be concluded that the device 'X' is a (select the correct option)
(A) Convex lens of focal length 10 cm.
(B) Convex lens of radius of curvature 20 cm.
(C) Convex lens of focal length 20 cm.
(D) Concave mirror of focal length 20 cm.
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).
A coin placed at the bottom of a vessel appears to be raised when water is poured in the vessel.
Explain the following term:
Incident ray
Draw diagram/diagrams to show them.
Complete the following diagrams in Figure by drawing the reflected rays for the incident rays 1 and 2.
For an incident ray directed towards centre of curvature of a spherical mirror the reflected ray:
The magnification for a mirror is -3. How are u and v related?
An object is placed at 4 cm distance in front of a concave mirror of radius of curvature 24 cm. Find the position of image. Is the image magnified?
An object forms a virtual image which is 1/8th of the size of the object. If the object is placed at a distance of 40 cm from the convex mirror, calculate:
- the position of the image
- the focal length of the convex mirror.
A shopkeeper wanted to fix a mirror which will give a maximum view of his shop. What type of mirror should he use? Give reason.
