Question

1. What phenomenon occurs with the converging lens? Explain.

2. What is the difference between a converging lens and a diverging lens? Explain.

3. What vision problem can be solved by converging lenses? Explain.

4. Mention some applications of converging lenses.

Answer 1

• Converging lenses are lenses which converge the light rays coming towards them, whereas diverging lenses are lenses which diverge the rays coming towards them. A converging lens have positive focal length.

• A converging lens causes exiting rays to be more convergent coming out than they were entering the lens. A diverging lens have negative focal length. A diverging lens causes exiting rays to be more divergent coming out than they were entering the lens.

• A converging lens can form a real image or a virtual image of a real object. A diverging lens always forms virtual images of real objects.

Nearsightedness, or myopia, is the inability to see distant objects and is corrected with a diverging lens to reduce power. Farsightedness, or hyperopia, is the inability to see close objects and is corrected with a converging lens to increase power