Narrow beams from high-power radars, both scientific and military, which are used to monitor objects throughout the inner solar system and in Earth orbit respectively. The constant-frequency carrier ...

Lasers work by emitting light that is “coherent” in that it doesn’t spread out in a disorganized way like light from most sources does. This makes extremely focused beams possible that can do things ...

Sound vibrations leave the singer's mouth. The higher the pitch of the sound, the higher the frequency, or number of vibrations in a given amount of time. The sound enters the microphone, where it is ...

A research team at City University of Hong Kong (CityU) has discovered a new type of sound wave: the airborne sound wave vibrates transversely and carries both rotation and orbital angular momentum ...

Wavelength, speed, frequency, and amplitude are the defining characteristics of a wave, but we are also interested in one more thing… Wavelength, speed, frequency, and amplitude are the defining ...

It’s a question I’m sure was keeping you up at night: can you make an object spin with a sound wave? The answer, generally speaking, used to be no. Now, though, mechanical engineers have taken a look ...