Once a client is presented with the HSTS policy, it caches the information for the specified max-age period. During that period, the browser refuses to access the web service over unencrypted HTTP, and refuses to grant exceptions to certificate errors (if the site previously presented a valid, trusted certificate).
A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The term laser originated as an acronym for light amplification by stimulated emission of radiation.
Laser therapies are medical treatments that use focused light. Unlike most light sources, light from a laser (which stands for light amplification by stimulated emission of radiation) is tuned to specific wavelengths. This allows it to be focused into powerful beams.