1. Waa maxay LED, LCD? LED waxay u taagan tahay Iftiin-Emitting Diode, qalab semiconductor ah oo laga sameeyay xayndaabyo ay ka mid yihiin Gallium (Ga), Arsenic (As), Fosfooraska (P), iyo Nitrogen (N). Marka elektaroonnada ay dib ugu noqdaan godad, waxay sii daayaan iftiin muuqda, taas oo ka dhigaysa LED-yada si heer sare ah u beddelaya ele...
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