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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?
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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.
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संबंधित प्रश्न
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 convex mirror in this diagram.
Which mirror has a wider field of view?
Name the mirror which can give:
an erect and diminished image of an object.
Where would the image be formed by a convex mirror if the object is placed:
between infinity and pole of the mirror?
Draw labelled ray-diagrams to show the formation of image in both the case.
State three characteristics of the image formed by a convex mirror.
A convex mirror used as a rear-view mirror in a car has a radius of curvature of 3 m. If a bus is located at a distance of 5 m from this mirror, find the position of image. What is the nature of the image?
Draw the given diagram in your answer book and complete it for the path of a ray of light after passing through the lens.
Draw ray diagrams to represent the nature, position and relative size of the image formed by a convex lens for the object placed:
between F1 and the optical centre O of the lens.
Which of the above two cases shows the use of convex lens as a magnifying glass? Give reasons for your choice.
An object is placed well outside the principal focus of a convex lens. Draw a ray diagram to show how the image is formed, and say whether the image is real or virtual.
When the reflecting surface is curved outwards the mirror formed will be ______.
