converging

Defects of vision

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The disorder in which a person cannot see nearby or distant objects clearly is called defect of vision. There are two most common defects of vision. They are: a)Myopia It is the defect of vision in which a person can see nearby objects clearly but cannot see distant objects. It is also called short sightedness … Read more

Differences between convex and concave lens

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S.N Convex lens Concave lens 1. It is thick in the middle but thin at the edges. It is thin in the middle but thick at the edges. 2. It converges the parallel rays of light falling on it. It diverges the parallel rays of light falling on it. 3. It has a real focus. … Read more