(a) A student is unable to see clearly the words written on the blackboard placed at a distance of
approximately 3 m for 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.
Answers
Answered by
6
Explanation:
Hi dear here is your answer
The boy who can't see written on the board is suffering from Myopia.
The causes which cause Myopia are
• Due to the high converging power of the eye lens.
• Due to Being Eye ball to long .
It can be corrected by using a concave lens .
Because concave lens reduces the high converfing power of lens because it is a diverging lens .
By using yhe concave lens the image is form on the Retina .
Stars twinkle because of turbulence in the atmosphere of the Earth. As the atmosphere churns, the light from the star is refracted in different directions. ... The reason is thatstars are so far away that they are essentially points of light on the sky, while planets actually have finite size.
❤☺follow me n mark as brainiest ☺❤
silent boy✌✌✌✌
Similar questions