wave beam การใช้

The sound wave beams emitted from such devices are highly coherent.
The device emits an invisible electromagnetic wave beam that travels at the speed of light.
Over the Memorial Day weekend in 1970, while Panish was at home, Hayashi tried a diode and it emitted a continuous-wave beam at just over 24 degrees Celsius and he was able to plot the complete spectrum with the very slow equipment available at the time.
The label " eye-safe " can be misleading, however, as it applies only to relatively low power continuous wave beams; a high power or Q-switched laser at these wavelengths can burn the cornea, causing severe eye damage, and even moderate power lasers can injure the eye.