Answer: A diode laser which emits at a wavelength of 988 nm is in the infra-red portion of electromagnetic spectrum.
Explanation:
Electromagnetic spectrum shows the wavelength or frequency ranges of different electromagnetic radiations. According to this spectrum, the range for infra-red region is from [tex]700 to 10^{6} nm[/tex].
Therefor, a diode laser which emits at a wavelength of 988 nm is in the infra-red portion of electromagnetic spectrum.
