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प्रश्न
What shape are your eye-lenses:
when you look at your hand?
उत्तर
When we look at our hand, the eye lens is thick. When we look at a nearby object, the eye lens becomes thick or more convex to converge the rays of light from the nearby object (our hand) to form an image on the retina.
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संबंधित प्रश्न
What is the function of the lens in the human eye?
Give the scientific names of the following parts of the eye:
muscles which change the shape of the eye-lens.
How does the convex eye-lens differ from the ordinary convex lens made of glass?
List, in order, the parts of the eye through which light passes to reach the retina.
What is presbyopia? Write two causes of this defect. Name the type of lens which can be used to correct presbyopia.
A student sitting on the last bench in the class cannot read the writing on the blackboard clearly but he can read the book lying on his desk clearly. Which of the following statement is correct about the student?
(a) The near point of his eyes has receded away.
(b) The near point of his eyes has come close to him.
(c) The far point of his eyes has receded away.
(d) The far point of his eyes has come closer to him.
Mention if the following statement is true (T) or false (F) Give reason.
Short-sightedness and hyperopia are one and the same thing
Name the following:
The most sensitive region of the retina.
In a relaxed state, the focal length of healthy eyes is _______.
