Class 10 Science - Chapter The Human Eye and the Colourful World NCERT Solutions | A student has difficulty reading the bla
A student has difficulty reading the blackboard while sitting in the last row. What could be the defect the child is suffering from? How can it be corrected?
When a student is having difficulty to read the blackboard while sitting in the last row, then this condition showing the myopia defect in the child also known as near- sightedness. In this defect of eye, the image of farthest object does not formed on retina, only forms in the front of the retina in which blurred image can be seen. This condition can be corrected by using the appropriate concave lens of suitable power. So, the eye will be able to see the correct image instead of blurred image, again on the retina.
More Questions From Class 10 Science - Chapter The Human Eye and the Colourful World
- Q:-
What is the far point and near point of the human eye with normal vision?
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Make a diagram to show how hypermetropia is corrected. The near point of a hypermetropic eye is 1 m. What is the power of the lens required to correct this defect? Assume that the near point of the normal eye is 25 cm.
- Q:-
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- Q:-
The human eye forms the image of an object at its
(a) cornea. (b) iris. (c) pupil. (d) retina.
- Q:-
The least distance of distinct vision for a young adult with normal vision is about
(a) 25 m. (b) 2.5 cm. (c) 25 cm. (d) 2.5 m.
- Q:-
A person with a myopic eye cannot see objects beyond 1.2 m distinctly. What should be the type of the corrective lens used to restore proper vision?
- Q:-
The change in focal length of an eye lens is caused by the action of the
(a) pupil. (b) retina.
(c) ciliary muscles. (d) iris. - Q:-
Why does the sky appear dark instead of blue to an astronaut?
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