12. Consider a current of 3 mA flowing through an LED whose band gap is about 2 eV. (A) How many photons are produced p...
12. Consider a current of 3 mA flowing through an LED whose band gap is about 2 eV. (A) How many photons are produced per second? (B) What is the power of the light produced? Notice that this small current produces a light that is easily visible. (For comparison, a typical flashlight bulb, which is very easily visible, consumes about a watt of power, of which about 50 mW is visible light.)
12. Consider a current of 3 mA flowing through an LED whose band gap is about 2 eV. (A) How many photons are produced per second? (B) What is the power of the light produced? Notice that this small current produces a light that is easily visible. (For comparison, a typical flashlight bulb, which is very easily visible, consumes about a watt of power, of which about 50 mW is visible light.)