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प्रश्न
Where should an object be placed so that a real and inverted image of the same size as the object is obtained using a convex lens?
उत्तर
When an object is placed at 2F1 of a convex lens, a real and inverted image of the same size as that of the object is formed at 2F2
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संबंधित प्रश्न
An object is placed at a distance of 15 cm from a convex lens of focal length 20 cm. List four characteristics (nature, position, etc.) of the image formed by the lens.
An object AB is placed between O and F1 on the principal axis of a converging lens as shown in the diagram.
Copy the diagram and by using three standard rays starting from point A, obtain an image of the object AB.
A student did an experiment with a convex lens. He put an object at different distances 25 cm, 30 cm, 40 cm, 60 cm and 120 cm from the lens. In each case he measured the distance of the image from the lens. His results were 100 cm, 24 cm, 60 cm, 30 cm and 40 cm, respectively. Unfortunately his results are written in wrong order.
What is the focal length of this lens?
What kind of lens can form:
an inverted diminished image?
Complete the following sentence.
A long-sighted person cannot see ........... objects clearly. Long-sightedness can be corrected by using .............. lenses.
A convex lens is placed in water. Its focal length will ______.
List four properties of the image formed by a convex mirror.
For which position of the object does a convex lens form a virtual and erect image? Explain with the help of a ray diagram.
Distinguish between:
Concave lens and Convex lens
The image obtained while finding the focal length of convex lens is ....................
