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प्रश्न
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.
उत्तर
The image will be diminished, real and inverted.
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संबंधित प्रश्न
Draw a ray diagram to show how a converging lens can form a real and enlarged image of an object.
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 2f from a convex lens of focal length f. The size of the image formed is ______ that of the object.
Which of the following lens would you prefer to use while reading small letters found in a dictionary?
Explain the rules for obtaining images formed by a convex lens with the help of ray diagram.
An object of height 3cm is placed at 10cm from a concave lens of focal length 15cm. Find the size of the image.
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
A student focussed the image of a candle flame on a white screen using a convex lens. He noted down the position of the candle screen and the lens as under
Position of candle = 12.0 cm
Position of convex lens = 50.0 cm
Position of the screen = 88.0 cm
- What is the focal length of the convex lens?
- Where will the image be formed if he shifts the candle towards the lens at a position of 31.0 cm?
- What will be the nature of the image formed if he further shifts the candle towards the lens?
- Draw a ray diagram to show the formation of the image in case (iii) as said above.
Complete the following table based on image formation by convex lens:
Position of Object | Position of Image | Nature of Image |
At infinity | (a) ______ | Real and inverted and highly diminished image |
Beyond 2F1 | (b) ______ | (c) ______ |
At 2F1 | (d) ______ | Real, inverted, same size (as object) image |
Between F1 and 2F1 | Beyond 2F2 | (e) ______ |
At focus F1 | (f) ______ | Real, inverted and highly enlarged image |
A lens forms an upright and magnified image of an object. Draw a labelled ray diagram to show the image formation.