Which part of the Electromagnetic spetrum spectrum is used in operating a RADAR and why?

(i) Why welder wears a special glass goggles during welding with arc? (ii) Which part of the electromagnetic spectrum is used in operating radar and why?

What is electromagnetic spectrum? Which part of the electromagnetic spectrum is used in operating a radar?

Which part of electromagnetic spectrum is used in operating a RADAR ?

Which part of electromagnetic spectrum is used in operating a RADAR?

Which part of electromagnetic spectrum is used in radar systems ?

Which part of the electromagnetic spectrum carries heat energy?

Which part of electromagnetic spectrum is absorbed by ozone layer?

Which part of electromagnetic spectrum is produced in nuclear reactions?