If you are referring to tracer bullets they were originally used by machine gunners to see where their fire was going in order to correct their aim and then hit whatever they were shooting at.
Alloys
Yes, tracers were in use during that time. The first tracers were developed by the British in 1915.
Stable isotopes are used as tracers.
Isotopes as tracers can be easy to follow even if you are in low concentration and also by non-invasive(distructive) methods.
n
Either beta or gamma
Tracer: A radioactive isotope that can be followed through the steps of a chemical reaction or industrial process.Two example of Tracers:1. tracers are used in finding weak spots in metal pipes and especially in oil pipes.2. Tracers injected into the body travel to organs and other structures where the chemical is normally used. this detects radiation.
Polonium isotopes are not used as tracers.
fluorescein
Ray Tracers happened in 1997.
Tracers like technetium-99m are used in medical imaging to diagnose conditions like cancer and heart disease. In environmental science, isotopes like carbon-14 are used to trace the movement of pollutants in ecosystems. Radioactive isotopes work as tracers because they can be easily detected using specialized equipment, allowing scientists to track their movement and behavior with high sensitivity and accuracy.
Ray Tracers was created on 1997-01-17.