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प्रश्न
What is power of accommodation of eye?
उत्तर
The ability of the eye lens to focus nearby as well as distant objects are called the power of accommodation of the eye.
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संबंधित प्रश्न
You have two lenses A and B of focal lengths +10 cm and –10 cm, respectively. State the nature and power of each lens. Which of the two lenses will form a virtual and magnified image of an object placed 8 cm from the lens? Draw a ray diagram to justify your answer
A convex lens of power 5 D and a concave lens of power 7.5 D are placed in contact with each other. What is the :
(a) power of this combination of lenses?
(b) focal length of this combination of lenses?
What do you understand by the power of a lens? Name one factor on which the power of a lens depends.
A diverging lens has a focal length of 0.10 m. The power of this lens will be:
Define the term focal length of a lens.
How is the power of a lens related to its focal length?
How does the power of a lens change if its focal length is doubled?
A symmetric double convex lens is cut in two equal parts by a plane containing the principal axis. If the power of the original lens was 4 D, the power of a divided lens will be
Consider the situation described in the previous problem. Where should a point source be placed on the principal axis so that the two images form at the same place?
How is accommodation produced?
