Lesson 3: Basic Laws of Light

Question 1

Radiometry

Answer 1

measure of radiant energy

Question 2

Shortwave

Answer 2

250 - 2500 nanometer wavelength ( 1nm = 10^-9m )

Question 3

Nanometer

Answer 3

Wavelength units for light

Question 4

Electron volt

Answer 4

energy unit for light/photon wavelengths (1eV= 1.60217646)

Question 5

Irradiance

Answer 5

metric for flux of light received on a surface(W/m²)

Question 6

Irradiation

Answer 6

flux of light on a surface for a period of time

metric for energy(Wh/m² or J/m²)

Question 7

Photometry

Answer 7

measure of optically percieved light

Question 8

Inverse Square Law

Answer 8

Light intensity decrease in proportion to the square of the distance from emitter and receiver