Power Of Accommodation Of Eye The ability of the eye lens to adjust its focal length is called accommodation. However, the focal length of the eye lens cannot be decreased below a certain minimum limit. To see an object comfortably and distinctly, you must hold it at about 25 cm from the eyes. The minimum distance, at which objects can be seen most distinctly without strain, … [Read more...] about Power Of Accommodation Of Eye
Human Eye and Colourful World
What is meant by Atmospheric Refraction?
What is meant by Atmospheric Refraction? We can observe the apparent random wavering or flickering of objects seen through a turbulent stream of hot air rising above a fire or a radiator. The air just above the fire becomes hotter than the air further up. The hotter air is lighter (less dense) than the cooler air above it, and has a refractive index slightly less than that of … [Read more...] about What is meant by Atmospheric Refraction?
What Is Scattering Of Light
What Is Scattering Of Light The interplay of light with objects around us gives rise to several spectacular phenomena in nature. The blue colour of the sky, colour of water in deep sea, the reddening of the sun at sunrise and the sunset are some of the wonderful phenomena we are familiar with. The path of a beam of light passing through a true solution is not visible. However, … [Read more...] about What Is Scattering Of Light