Assertion: led's region | /r/HasProperty | 650 nanometers
Facets:
Source sentences:
text: In order to increase the frequency of emission to achieve wavelengths in the visible red region (650 nanometers), the band gap must be increased to approximately 1.9 volts.
text: In order to increase the frequency of emission into the visible red region (about 650 nanometers), the band gap must be increased to approximately 1.9 electron-volts.