Answer:
A light emitting diode (a semiconductor diode which glows when voltage is applied.
Answer:
if im not mistaken i think its d let me know if correct plz
Refraction. refraction is always accompanied by a wavelength and speed change
<h2>0.054×2.33×90</h2><h3>=0.11582×90</h3><h3>=11.3238</h3>
please mark this answer as brainlist
