(a) 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.
(b) Why do stars twinkle ? Explain.
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Answer: Hypermetropia
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Answer:[a]
MYOPIA
Explanation:
myopia is a condition when your i cant see far object clearly.
this can be due to elongation of eye ball or improper working of the ciliary muscles (eye lens muscles).
this can be corrected by using concave lens.
Answer:[b]
due to atmospheric refraction.
MARK BRAINLIEST
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