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प्रश्न
A student sitting in the last row of the class-room is not able to read clearly the writing on the blackboard.
How can this defect by corrected?
उत्तर
To correct his defect, he should use concave lenses in his spectacles.
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संबंधित प्रश्न
What is the other name of old age hypermetropia?
What is the far point of a person suffering from myopia (or short-sightedness)?
Have a look at the posture of this girl who is reading a book and answer the questions which follow:
Name the problem she is facing.
What eye defect is hypermetropia? Describe with a ray diagram how this defect of vision can be corrected by using an appropriate lens.
Name an old age eye defect. Why is it caused?
Differentiate between:
Short-sightedness and Long-sightedness.
Myopia may arise due to ____________.
Draw ray diagram showing myopic eye.
A person needs a lens of power –4.5 D for correction of her vision.
- What kind of defect in vision is she suffering from?
- What is the focal length of the corrective lens?
- What is the nature of the corrective lens?
Name the following:
Two kinds of accomodations.
