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प्रश्न
What is the difference between the two images formed above?
उत्तर
| S.No | Virtual image made by a converging lens | Virtual image made by a diverging lens |
| 1 | Image is larger than the object | Image is smaller than the object |
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संबंधित प्रश्न
Define the principal focus of a concave lens.
A converging lens of focal length 5 cm is placed at a distance of 20 cm from a screen. How far from the lens should an object be placed so as to form its real image on the screen?
Give the position, size and nature of image of formed by a concave lens when the object is placed:
at infinity.
A concave lens of 20 cm focal length forms an image 15 cm from the lens. Compute the object distance.
What type of lens is used to correct
myopia?
A lens forms an upright and diminished image of an object irrespective of its position. What kind of lens is this?
At what distance from a concave lens of focal length 20 cm a 6 cm tall object be placed so as to obtain its image at 15 cm from the lens? Also calculate the size of the image formed.
Draw a ray diagram to justify your answer for the above situation and label it.
Explain the working of an astronomical telescope using refraction of light.
Do we expect any change in the position, nature, and size of the image
(i) formed by a concave lens,
(ii) with a change in the position of the object?
If the power of a lens is -4.0 D, then it means that the lens is a ______.
