Advertisements
Advertisements
प्रश्न
Draw a neat labeled diagram to show how hypermetropia can be rectified.
Advertisements
उत्तर
APPEARS IN
संबंधित प्रश्न
What is the scientific name of
long-sightedness?
Where is the near point of a person suffering from hypermetropia (or long-sightedness)?
Give Reason:
Why do we see clearly in the central region of the retina?
Explain the Term: Hypermetropia
With respect to human eye explain:
(i) How is the image formed on the retina?
(ii) How is the amount of light entering the eye-controlled?
(iii) What type of lens is used for the correction of ‘Long sight’ defect?
(iv) With the help of a ray, diagram show the defect of the eye and then its correction after the use of a lens.
Write scientific reason.
Nearsightedness, this defect can be corrected by using spectacles with concave lens.
Myopia and hypermetropia can be corrected by:
A student sitting at the back of the classroom cannot read clearly the letters written on the blackboard. What advice will a doctor give to her? Draw ray diagram for the correction of this defect.
A person is unable to see clearly a poster fixed on a distant wall. He however sees it clearly when standing at a distance of about 2 m from the wall.
- Draw ray diagram to show the formation of image by his eye lens when he is far away from the wall.
- List two possible reasons of this defect of vision.
- Draw ray diagram to show the correction of this defect using appropriate lens.
Given alongside is a diagram depicting a defect of the human eye. Study the same and answer the questions that follow:
 |
- Name the defect shown in the diagram.
- Give two possible reasons for this defect.
- Name the parts labelled 1 to 4.
- Name the type of lens used to correct this eye defect.
- Draw a labelled diagram to show how the above mentioned defect is rectified using the lens named above.
