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प्रश्न
A driver uses a convex mirror as a rearview mirror. Explain the reason with the help of a ray diagram.
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उत्तर
A convex mirror always forms a small and upright image between pole and focus. That means in a small area of mirror driver can see all the traffic coming from behind.
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संबंधित प्रश्न
An object is placed at a distance of 40 cm in front of a convex mirror of radius of curvature 40 cm. List four characteristics of the image formed by the mirror.
If the focal length of a spherical mirror is 12.5 cm, its radius of curvature will be:
(a) 25 cm
(b) 15 cm
(c) 20 cm
(d) 35 cm
Fill in the following blank with a suitable word:
A ray of light which is parallel to the principal axis of a convex mirror, appears to be coming from ............ after reflection from the mirror.
Name two factors on which the focal length of a lens depends.
An object is placed at a distance of 100 cm from each of the above lenses A and B. Calculate
- image distance, and
- magnification, in each of the two cases.
Write true or false
The focal length of a convex mirror is equal to its radius of curvature.
A ............ mirror always forms a virtual image.
The nature of image formed by a convex mirror when the object distance from the mirror is less than the distance between pole and focal point (F) of the mirror would be ______.
Identify the device used as a spherical mirror or lens in following case, when the image formed is virtual and erect in case.
Object is placed between the focus and device, image formed is enlarged and on the same side as that of the object.
The field of view is maximum for ______.
