Optical Properties of Materials in ENGR 311 Test Questions Answered Correctly Latest Update
2025-2026
Photon - Answers A particle representing a quantum of light.
Wavelength - Answers Distance between successive peaks of a wave.
Frequency - Answers Number of wave cycles per second (Hz).
Energy - Answers Capacity to do work, measured in Joules or eV.
Plank's Constant - Answers Fundamental constant relating energy and frequency.
Band Gap - Answers Energy difference between conduction and valence bands.
Solar Cell - Answers Device converting light into electricity using photons.
Light Emitting Diode (LED) - Answers Semiconductor device that emits light when current flows.
Absorption - Answers Process where photons are taken up by a material.
Reflection - Answers Bouncing back of light from a surface.
Transmission - Answers Passing of light through a material.
Scattering - Answers Redirection of light in multiple directions.
Transparency - Answers Ability of a material to transmit light without scattering.
Translucency - Answers Partial transmission of light, causing diffusion.
Opacity - Answers Inability of a material to transmit light.
Color - Answers Perceived wavelength of light reflected or transmitted.
Green Photon - Answers Photon with a wavelength of approximately 525 nm.
Ruby - Answers Red gemstone with a band gap of 2.2 eV.
GaP - Answers Semiconductor with a band gap of 2.26 eV.
Colorless Material - Answers Material with a band gap > 3.1 eV.
Incident Light - Answers Light that strikes a surface before interaction.
Electron-Hole Pair - Answers Charge carriers generated in a semiconductor by photons.
Absorption Spectrum - Answers Graph showing absorption of light at different wavelengths.
Electromagnetic Spectrum - Answers Range of all types of electromagnetic radiation.
2025-2026
Photon - Answers A particle representing a quantum of light.
Wavelength - Answers Distance between successive peaks of a wave.
Frequency - Answers Number of wave cycles per second (Hz).
Energy - Answers Capacity to do work, measured in Joules or eV.
Plank's Constant - Answers Fundamental constant relating energy and frequency.
Band Gap - Answers Energy difference between conduction and valence bands.
Solar Cell - Answers Device converting light into electricity using photons.
Light Emitting Diode (LED) - Answers Semiconductor device that emits light when current flows.
Absorption - Answers Process where photons are taken up by a material.
Reflection - Answers Bouncing back of light from a surface.
Transmission - Answers Passing of light through a material.
Scattering - Answers Redirection of light in multiple directions.
Transparency - Answers Ability of a material to transmit light without scattering.
Translucency - Answers Partial transmission of light, causing diffusion.
Opacity - Answers Inability of a material to transmit light.
Color - Answers Perceived wavelength of light reflected or transmitted.
Green Photon - Answers Photon with a wavelength of approximately 525 nm.
Ruby - Answers Red gemstone with a band gap of 2.2 eV.
GaP - Answers Semiconductor with a band gap of 2.26 eV.
Colorless Material - Answers Material with a band gap > 3.1 eV.
Incident Light - Answers Light that strikes a surface before interaction.
Electron-Hole Pair - Answers Charge carriers generated in a semiconductor by photons.
Absorption Spectrum - Answers Graph showing absorption of light at different wavelengths.
Electromagnetic Spectrum - Answers Range of all types of electromagnetic radiation.
