Distance is measured based on the Doppler effect. This has to do with a phase change in the the light based on its wavelength
There are a great many devices in the world that use lasers. Computer mice for example might use lasers to operate efficiently.
Tape measures or laser range-finders would do that.
Range finders work by emitting a laser beam towards a target and measuring the time it takes for the beam to bounce back. This technology, known as LIDAR (Light Detection and Ranging), allows range finders to accurately calculate distances by using the speed of light.
Lazers do not exist. Lasers do, here is a short list of applications: bar code scanner, pointer, electric eyes, range finders, guidance systems, interferometers, high energy physics, medical/dental, optical disks (cds, dvd, blue ray), laser induced breakdown spectroscopy, matrix assisted laser desorption/ionization mass spectrometry, cutting devices... originally people wondered what the use of lasers could be, now the question is more of what can't a laser do.
Yes, you can use golf range finders while setting a club record.
They both use lasers.
One additional use of lasers in entertainment is that of laser tag. Laser Quest is just one of numerous laser tag companies that are considered to be in the entertainment industry.
A measuring tape, or one of those laser distance finders.
Some examples of liquid lasers are dye lasers, which use organic dyes dissolved in a solvent as the gain medium, and liquid crystal lasers, which use liquid crystal materials to create the gain necessary for laser emission. These liquid lasers have tunable emission wavelengths and can be used in various research and industrial applications.
The use of hair removal lasers can be painful. The older lasers are more painful than the newer ones. The pain comes from the heat the laser generates as it removes the hair.
you know the place that has the lasers on the windows well get to the top and click on the bars and LASER
The laser is used to read the data on the disc