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प्रश्न
What kind of lens is used to correct
short-sightedness
उत्तर
Concave lenses are used to correct short-sightedness.
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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 same size as the object?
A converging lens is used to produce an image of an object on a screen,object on a screen. What change is needed for the image to be formed nearer to the lens?
(a) increase the focal length of the lens
(b) insert a diverging lens between the lens and the screen
(c) increase the distance of the object from the lens
(d) move the object closer to the lens
A ray of light is going towards the focus of a concave lens. draw a ray diagram to show the path of this ray of light after refraction through the lens.
Give the position, size and nature of image of formed by a concave lens when the object is placed:
at infinity.
Which type of lens is
a diverging lens? Explain your answer with diagrams.
State one practical use each of convex mirror, concave mirror, convex lens and concave lens.
Name one of the common defects of vision and the type of lens used to remove it.
A person finds difficulty in seeing nearby objects clearly. His vision can be corrected by using spectacles containing:
(a) converging lenses
(b) diverging lenses
(c) prismatic lenses
(d) chromatic lenses
The power of a lens is negative. State whether it is convex or concave.
If the image formed by a lens is diminished in size and erect, for all positions of the object, what type of lens is it?
