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प्रश्न
Draw ray diagram showing hypermetropic eye.
उत्तर
Hypermetropic eye : In hypermetropic eye, the light rays from a closeby object are focussed at a point behind the retina. Here, N is the near point of a hypermetropic eye and N’ is the near point of a normal eye.
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संबंधित प्रश्न
Make a diagram to show how hypermetropia is corrected. The near point of a hypermetropic eye is 1 m. What is the power of the lens required to correct this defect? Assume that the near point of the normal eye is 25 cm.
Name the defect shown in the diagram.
In hypermetropia human eye _______.
Find the odd one out and give its explanation.
Hypermetropia can be corrected using concave lens of proper focal length.
Write scientific reason.
Farsightedness, this defect can be corrected by using convex lens.
The defect of vision in which the person is able to see a distant object distinctly but cannot see nearby objects clearly is called:
Assertion: The near point of a hypermetropia eye is more than 25 cm away.
Reason: Hypermetropia is corrected using spectacles containing concave lenses.
List two difference in the characteristic properties of the virtual images formed by the two types of spherical lenses (concave and convex). How are these characteristics of the two lenses use in the correction of the two common defects of vision namely myopia and hypermetropia?
Differentiate between members of the following pair with reference to what is asked in the bracket.
Myopia and Hyperopia (type of lens used for correction).
