Anemometer beam exits reflect, or backscatter, the light back into a detector, where it is measured relative to the original laser beam. When the particles are in great motion, they produce a Doppler shift for measuring wind speed in the laser light, which is used to calculate the speed of the particles, and therefore the air around the anemometer. Ultrasonic anemometers, first developed in the 1950s, use ultrasonic sound waves to measure wind velocity. They measure wind speed based on the time of flight of sonic pulses between pairs of transducers. Measurements from pairs of transducers can be combined to yield
What Difference Does It Make? and the covers featuring Morrissey are now very rare and collectible. "What Difference Does It Make?" was released without an accompanying music video. Speaking to Tony Fletcher on "The Tube" in 1984, Morrissey remarked that he felt that the video market was something that was going to "die very quickly", and that he wanted to "herald the death" of it. What Difference Does It Make? "What Difference Does It Make?" is a song by the English rock band the Smiths, written by singer Morrissey and guitarist Johnny Marr. It was the band's third single and is featured on their debut