Geometric optics explains how light behaves when it reflects, refracts, and forms images through lenses and mirrors. From total internal reflection in fiber optics to the sparkle of rainbows, these ...

An optical isolator created at the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) could significantly improve optical systems for many practical applications, according to ...

Visualizing tissues and neurons inside an animal's skull has long been a challenge for biophotonics techniques, thanks to the skull's thickness and the complex structures inside. A team at the ...

When a ray of light that is travelling through a piece of glass strikes the interface between the glass and the air, it changes direction according to Snell’s law. If the angle of incidence is less ...