A p-n photodiode is fabricated from a semiconductor with band - gap of 2.8 eV . Can it detect a wavelength of 6000nm?

Explanation

To determine whether a p-n photodiode with a band gap of 2.8 eV can detect a wavelength of 6000 nm, we can follow these steps:

### Step 1: Understand the relationship between energy and wavelength
The energy (E) of a photon can be calculated using the formula:
\[ E = \frac{hc}{\lambda} \]
where:
- \( h \) is Planck's constant (\( 6.626 \times 10^{-34} \, \text{J s} \)),
- \( c \) is the speed of light (\( 3 \times 10^8 \, \text{m/s} \)),
...