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Question
State whether the following statement is true or false:
Short-sightedness can be cured by using a concave lens.
Solution
True.
Short-sightedness can be corrected by using concave lenses.
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RELATED QUESTIONS
Due to gradual weakening of ciliary muscles and diminishing flexibility of the eye lens a certain defect of vision arises. Write the name of this defect. Name the type of lens required by such persons to improve the vision. Explain the structure and function of such a lens.
State whether concave lens has a real focus or a virtual focus.
An illuminated object is placed at a distance of 20 cm from a converging lens of focal length 15 cm. The image obtained on the screen is:
(a) upright and magnified
(b) inverted and magnified
(c) inverted and diminished
(d) upright and diminished
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
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(c) increase the distance of the object from the lens
(d) move the object closer to the lens
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What type of lens is used to correct
myopia?
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How will you differentiate between a convex and a concave lens by looking at
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- a printed page?
Copy the following figure and complete it to show the formation of the image of the object AB. Name the lens used in the figure.
