Multiple choice technology

What is the wave length of red LED?

  1. 590nm - 610nm

  2. 500nm - 570nm

  3. 400nm - 450nm

  4. 610nm - 760nm
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D Correct answer
Explanation

Red light occupies the longest wavelength region of the visible spectrum, approximately 610-760 nanometers. This range represents the lower energy end of visible light, with wavelengths longer than orange (590-610nm) and shorter than infrared (beyond 760nm).

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