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प्रश्न
A lens forms an upright and magnified image of an object. Draw a labelled ray diagram to show the image formation.
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उत्तर
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संबंधित प्रश्न
A lens forms an erect, magnified, and virtual image of an object. Draw a labelled ray diagram to show the image formation.
A converging lens forms the image of an object placed in front of it, beyond 2F2 of the lens. State three characteristics of the image.
A lens forms an inverted image of an object. What is the nature of the image real or virtual?
An object is placed at a distance of more than 40 cm from a convex lens of focal length 20 cm. The image formed is real, inverted and ______.
An object is placed at a distance 5 cm from a convex lens of focal length 10 cm. The image formed is virtual, upright and _____.
Explain the rules for obtaining images formed by a convex lens with the help of ray diagram.
An object is placed at a distance 20cm from a convex lens of focal length 10cm. Find the image distance and nature of the image.
An object of height 3cm is placed at 10cm from a concave lens of focal length 15cm. Find the size of the image.
Sudha finds out that the sharp image of the window pane of her science laboratory is formed at a distance of 15 cm from the lens. She now tries to focus the building visible to her outside the window instead of the window pane without disturbing the lens. In which direction will she move the screen to obtain a sharp image of the building? What is the approximate focal length of this lens?
Draw ray diagrams showing the image formation by a convex lens when an object is placed
- between optical centre and focus of the lens
- between focus and twice the focal length of the lens
- at twice the focal length of the lens
- at infinity
- at the focus of the lens
