science
Grade6
Easy
Question
The eyes can see ___ clearly.
- Only far away objects
- Only nearby objects
- Objects located more than 25 cm away
- All of the above
Hint:
We can read a book or even look at a bird flying high.
The correct answer is: All of the above
- The human eye can see far beyond the Earth's horizon. The surface of the earth becomes invisible at a distance of 5 kilometers. But our sight goes far beyond the horizon.
- A normal eye cannot clearly see objects closer than 25 cm because the ciliary muscle of the eye cannot contract beyond a certain limit.
- If the object is at a distance of less than 25 cm from his eye, the object will appear blurry and cause eye fatigue.
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