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2. Explain why light rays converge when passing through a double convex lens by describing the...

2. Explain why light rays converge when passing through a double convex lens by describing the paths of three light rays; one along the optic axis and the other two parallel to the optic axis.

3. What happens to the image if half a converging lens is covered? Explain why this occurs.

4. What are the conditions necessary to form a virtual image using a converging lens?

5. What type of lens is used in a magnifying glass? Explain how to use the magnifying glass properly to see the largest possible image. Where should your eye be located and where should the object be located?

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2) Lenses are made of transparent material such as glass or plastic with an index of refraction greater than that of air. Convex lenses refract parallel light rays so that they meet. Parallel light rays passing through it bend inward and meet (converge) at a spot just beyond the lens known as the focal point. The ray passing along the optical axis pass undeviated.

panallel ray optical aris f parallel ray

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