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. What is meant by power of accommodation of the eye?
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?
Why does the sky appear dark instead of blue to an astronaut?
Why does the Sun appear reddish early in the morning?
Explain why the planets do not twinkle?
The human eye forms an image of an object at its(
a) cornea
(b) iris
(c) pupil
(d) retina