Q. In LED visible light is produced by
A) Gallium phosphide
B) Gallium arsenide
C) Germanium phosphide
D) Silicon phosphide
Explanation
(b) In materials like gallium arsenide the number of photons of light energy is sufficient to produce quite intense visible light.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.