Why do we blink our eyes?

Continuous process of opening and closing of eyelids is called blinking. A person approximately blinks after every four or five seconds. The first and foremost function of blinking is to spread the lubricant through eyelids and eyelashes. The lubricant is produced within the eyes itself […]

How sunglasses work?

While buying sunglasses all of us think that it protects our eyes from high intensity light. So how they work in the protection of our eyes? Tinting of glasses determines the amount of light we are exposed to. The black and grey tinted lenses provide […]

Why is sky blue?

When light moves through the atmosphere it passes from gas molecules in the air. Longer wavelength of light passes straight through atmosphere for e.g.: – green, violet, yellow, etc and light of shorter wavelength is absorbed by these molecules for e.g.:- blue light. By the […]