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.

Experiments coupling light and sound reveal the surprising effect that measuring nothing can cool the vibrations of an object ...

Scientists have been unable to confirm the existence of time reflection due to the amount of energy required to create a ...

Researchers at the University of Twente have solved a long-standing problem: trapping optically-generated sound waves in a standard silicon photonic chip. This discovery, published as a featured ...

Let's go back to those sound waves from before. See, sound waves, like light waves, have peaks and valleys. Noise-cancelling headphones have their own built-in microphone. And when the headphone's ...

We've talked about what sound waves are, now let's establish why they ... Pink noise is best for: People who are light sleepers. Try it: Check out Honeywell's Dreamweaver Sleep Fan, a small ...

Here we use photonics, or light energy, to produce the sound wave. This approach has multiple advantages, chief of which is ...

This particular snow was light and fluffy, a perfect sound absorber. When the ground is covered with fresh, dry, fluffy snow, sound waves are absorbed into all the air pockets in the snow ...

The human ear detects sound. Sound waves enter the ear canal and cause the eardrum to vibrate. Three small bones transmit these vibrations to the cochlea. These bones transmit most efficiently ...