Lasers can cause damage in biological tissues, both to the eye and to the skin, due to several mechanisms. Thermal damage, or burn, occurs when tissues are heated to the point where denaturation of proteins occurs. Another mechanism is photochemical damage, where light triggers chemical reactions in tissue.
March 9: Teams are allowed to begin negotiating with other teamsâ players who are set to become unrestricted free agents at the end of the league year. This is the first time the NFL is providing a window to negotiate with other teamsâ free agents prior to the start of free agency.
An unrestricted free agent is a player whose contract has expired and is free to negotiate with any team without his present team having the opportunity to match the contract negotiated between the player and the other team. There are two types of franchise tag ... exclusive and non-exclusive: Exclusive: The player must be offered a one year contract 1) at a salary of the average of the top five salaried players at his position, or 2) at a salary at least 120% of his previous year's salary, whichever of the two is the higher amount.