If I shine light from 300-1600 nm into a material and note that absorption peaks at 1450 nm and then drops at longer wavelengths:

1. Calculate the band gap (assuming absorption of light is due to electronic transitions from valence band to conduction band)
2. Determine whether or not the material would be transparent or opaque to white light
3. Do you think it is a metallic or nonmetallic material? Why?