The Basic Principles Of เลเซà¸à¸£à¹Œ
The commonest form of laser makes use of feedback from an optical cavity—a pair of mirrors on either finish from the attain medium. Light bounces backwards and forwards involving the mirrors, passing from the get medium and staying amplified every time. Usually one of the two mirrors, the output coupler, is partly transparent.ช่วยลบà¸