Advertisements
Advertisements
प्रश्न
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?
Advertisements
उत्तर
In the case of a convex lens, as the object moves away from it, the size of the image formed on a screen decreases.
APPEARS IN
संबंधित प्रश्न
Define the radius of curvature of spherical mirrors.
Explain with a suitable diagram, how a concave mirror converges a parallel beam of light rays. Mark clearly the pole, focus and centre of curvature of concave mirror in this diagram.
Describe with a suitable diagram, how a convex mirror diverges a parallel beam of light rays. Mark clearly the pole, focus and centre of curvature of concave mirror in this diagram.
A ray of light of going towards the focus of a convex mirror becomes parallel to the principal axis after reflection from the mirror. Draw a labelled diagram to represent this situation.
The diagrams show the appearance of a fork when placed in front of and close to two mirrors A and B, turn by turn.
Figure
(a) Which mirror is convex
(b) Which mirror is concave
Give reasons for your choice.
A shop security mirror 5.0 m from certain items displayed in the shop produces on-tenth magnification.
What is the type of mirror?
Write true or false
The focal length of a convex mirror is equal to its radius of curvature.
List four properties of the image formed by a convex mirror when object is placed between focus and pole of the mirror.
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 Convex mirror always forms ______ and ______ image.
