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प्रश्न
Construct ray diagrams to illustrate the formation of a virtual image using a diverging lens.
उत्तर
When an object is placed anywhere between the optic centre and infinity of a converging lens, the image formed is virtual, erect, and diminished as shown in the figure.
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संबंधित प्रश्न
Where must the object be placed for the image formed by a converging lens to be:
real, inverted and larger than the object?
Fill in the following blank with suitable word:
A convex lens .................. rays of light, whereas a concave lens .................. rays of light.
Give the position, size and nature of image of formed by a concave lens when the object is placed:
anywhere between optical centre and infinity.
Which type of lens is :
a converging lens, and which is
Which type of lens is
a diverging lens? Explain your answer with diagrams.
Only one of the following applies to a concave lens. This is:
(a) focal length is positive
(b) image distance can be positive or negative
(c) height of image can be positive or negative
(d) image distance is always negative
Name one of the common defects of vision and the type of lens used to remove it.
A person cannot see distant objects clearly. His vision can be corrected by using the spectacles containing:
(a) concave lenses
(b) plane lenses
(c) contact lenses
(d) convex lenses
An object is placed on the axis of a lens. An image is formed by refraction in the lens. For all positions of the object on the axis of the lens, the positions of the image are always always between the lens and the object name the lens.
Explain the working of an astronomical telescope using refraction of light.
