THERE is in Upper Thibet a plateau called the “Kyan Chu Plain,” on which phenomena of mirage are frequently seen. The plain is at a height varyingfrom 15,000 to 16,000 feet. A cold wind comes down ...

We are surrounded by waves. tiny vibrational waves transport sound to our ears. Light waves stimulate the retinas of our eyes. Electromagnetic waves bring radio, television and endless streaming ...

Ultrasound scans could soon be much more detailed, thanks to a novel material that can bend sound waves the “wrong” way. This property, known as negative refraction, means the material should bring ...

The TRANSMISSION of acoustic energy through a medium via a SOUND WAVE. See: SOUND, SPEED OF SOUND. Compare: ACOUSTIC RADIATION. The levels of outdoor NOISE, whether they are intrusive or the normal ...

The concept of topological phases have not only revolutionized our understanding of physics or materials, but also brought about new possibilities for applications. Recent advances in higher-order ...

The transmission of acoustic energy through a medium via a sound wave. See: Sound, Speed of Sound. Compare: Acoustic Radiation. The levels of outdoor noise, whether they are intrusive or the normal ...

Scientists have demonstrated that negative refraction can be achieved using atomic arrays -- without the need for artificially manufactured metamaterials. Scientists have long sought to control light ...

There are five general senses: touch for feels, taste for food, smell for avoiding trash, hearing for sounds, and, of course, ...

Refraction close refractionProcess by which a wave changes speed and sometimes direction upon entering a denser or less dense medium, eg a light ray changes direction when refracted by a lens. of ...