Optical sensors are a broad class of device for detecting light intensity. This can be just a simple component for notifying when ambient light levels rise above or fall below a prescribed level, or a ...

Fibre optics and optical communications is the use of thin strands of glass for sending information encoded into light over long distances. Total internal reflection prevents light inserted into one ...

In a note dated 27 February 2022, the Secretary-General informed Member States that the eleventh emergency special session would convene at Headquarters on Monday, 28 February 2022 for the ...