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प्रश्न
What is Hypermetropia (far sightedness)?
उत्तर
Hypermetropiais a defect of vision in which a person cannot see nearby objects clearly, but has no problems in seeing distant objects.
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संबंधित प्रश्न
A student is unable to see clearly the words written on the black board placed at a distance of approximately 3 m from him. Name the defect of vision the boy is suffering from. State the possible causes of this defect and explain the method of correcting it.
What is the scientific name of
short-sightedness
To read a book held at a distance of 25 cm, will she need converging or diverging spectacle lenses?
Draw a ray diagram to show how Hypermetropia is defect can be corrected using a lens.
Observer the following diagram and answer the questions.
a) Which eye defect is shown in this diagram?
b) What are the possible reasons for this eye defect?
c) How this defect is corrected, write it in brief?
Give Reason:
Older people require glasses to read and write.
Give Reason:
Deficiency of vitamin A causes night blindness.
Draw a neat labeled diagram to show how hypermetropia can be rectified.
Choose the Odd One Out:
Assertion: Concave mirrors are used as reflectors in torches, vehicle head lights and in search lights.
Reason: When an object is placed beyond the center of curvature of a concave mirror, the image formed is real and inverted.
