Scientists have come up with scenarios through which the first eye-like structure, a light-sensitive pigmented spot on the skin, could have gone through changes and complexities to form the human ...

In this video, learn about different parts of the human eye and how our sight ... This is the part of the eye that lets the light in. Lights out please! When it’s dark, muscles in the iris ...

The sensor on your digital camera picks up a lot more than just the light that’s visible to the human eye. Camera manufacturers go out of their way to reduce this to just the visible spectrum in ...

To understand where black falls on the color spectrum, first consider what light actually is. Light is radiation visible to the human eye Light is energy called electromagnetic radiation.

The intricacy and seeming perfection of the eye, both as an object of anatomical beauty and as a working machine, have worried and intrigued scientists, philosophers and zealots, especially during ...

This shows the optician the blood vessels on the surface of the retina and the light-sensitive cells. A human eye has more than a million light-sensitive cells. Students could explore how their ...

This first light, as it's called, shows that all of the spacecraft's systems are working just as expected. "Based on the ...