Advertisements
Advertisements
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.
उत्तर
Four properties of the image formed by the given convex mirror are:
(i) Image is always erect
(ii) Small in size
(iii) Virtual
(iv) Always forms behind the mirror between focus and pole.
APPEARS IN
संबंधित प्रश्न
What kind of mirrors are used in big shopping centres to watch the activities of the customers?
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.
How will you distinguish between a plane mirror, a concave mirror and a convex mirror without touching them?
Two big mirrors A and B are fitted side by side on a wall. A man is standing at such a distance from the wall that he can see the erect image of his face in both the mirrors. When the man starts walking towards the mirrors, he find that the size of his face in mirror A goes on increasing but that in mirror B remains the same.
(a) mirror A is concave and mirror B is convex
(b) mirror A is plane and mirror B is concave
(c) mirror A is concave and mirror B is plane
(d) mirror A is convex and mirror B is concave
A shop security mirror 5.0 m from certain items displayed in the shop produces on-tenth magnification.
What is the radius of curvature of the mirror?
Write true or false
At the point of incidence, a line drawn at right angles to the surface, separating the two media, is called the normal.
The focal length of a convex mirror is equal to its radius of curvature.

Numerical problem.
A concave mirror produces three times magnified real image of an object placed at 7 cm in front of it. Where is the image located? (Ans: 21 cm in front of the mirror)
The distance between an object and a convex lens is changing. It is noticed that the size of the image formed on a screen is decreasing. Is the object moving in a direction towards the lens or away from it?