Question

Consider five materials with different magnitude band gaps listed below. Select all of these materials that are expected to absorb 450 nm incident light. 1.9 eV 1.1 eV O 0.8 eV O 3.2 eV 2.5 eV

Answer 1

The materials with band gaps of 1.9 eV and 2.5 eV are expected to absorb 450 nm incident light.

Step-by-step explanation:

To determine which materials are expected to absorb 450 nm incident light, we need to convert the given wavelengths to energy using the formula:

Energy (eV) = (1240 nm) / (Wavelength (nm))

First, let's convert the wavelength of 450 nm to energy:

Energy (eV) = (1240 nm) / (450 nm)

Energy (eV) ≈ 2.76 eV

Now we can compare this energy value with the given band gaps of the materials to identify which ones are expected to absorb 450 nm incident light.

The materials with band gaps that are expected to absorb 450 nm incident light are:

1.9 eV

2.5 eV