blue light

"Blue light" refers to both a specific part of the light spectrum and to lights used by emergency vehicles.

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Definition

B2Science

(technical)Visible light with wavelengths between approximately 400 and 495 nanometers.

Example

  • Blue light is part of the visible spectrum and is located near ultraviolet light.

B2Technology

(common)Light emitted by digital screens and LED lights that can affect sleep and eye health.

Example

  • Many smartphones now come with blue light filters to reduce eye strain.

B1Emergency

(common)A flashing light on emergency vehicles indicating urgency and requesting right of way.

Example

  • The ambulance sped through the traffic with its blue light flashing.

Similar

Terms that have similar or relatively close meanings to "blue light":

red lightwhite lightyellow lightblack lightgreen lightultraviolet lighttop lightdark lightlight blueneon lightrange lightbright lightssea lightblue flashfirst lightnatural lightlight wavehard lightlight downelectric lightlight offlight spectrumblue greenbad lightray of lightamber lightice bluelight sectordeep bluesmall blue