The human eye is a wonderful instrument, relying on refraction and lenses to form images. There are many similarities between the human eye and a camera, including:
a diaphragm to control the amount of light that gets through to the lens. This is the shutter in a camera, and the pupil, at the center of the iris, in the human eye.
a lens to focus the light and create an image. The image is real and inverted.
a method of sensing the image. In a camera, film is used to record the image; in the eye, the image is focused on the retina, and a system of rods and cones is the front end of an image-processing system that converts the image to electrical impulses and sends the information along the optic nerve to the brain.
The way the eye focuses light is interesting, because most of the refraction that takes place is not done by the lens itself, but by the aqueous humor, a liquid on top of the lens. Light is refracted when it comes into the eye by this liquid, refracted a little more by the lens, and then a bit more by the vitreous humor, the jelly-like substance that fills the space between the lens and the retina.
The lens is critical in forming a sharp image, however; this is one of the most amazing features of the human eye, that it can adjust so quickly when focusing objects at different distances.
Topic : family :D
Family plays an essential role in human lives. It is said that a family is like a tree. There are many branches in the tree. Similarly, in a man’s life, there are many relations in a family such as his wife, his kids, and his parents all are living together. Family members share and discuss everything. They share equal parts of all the responsibilities in a family. In society, there is much need of a good family. It is because the good family makes the social good, and a good community can make a good nation.
Everyone wants a god family, where every member will understand each other better for everything. Even at many issues that happen with other family members, everyone will support each other and get a united family. Every member of the family become happier, and they don’t feel any tension about anything. It is because of the family behind those members. In modern times, people are busy and hardly have time for their family members. People are working and furthering their education among important things to lead a better life. However, a family needs to take some time for each other. Everyone needs to realize that there is nothing that is as essential as family. Also, it is essential to make sure that, you need to find some time to spend with the family members as a family.
