Key Terms
optics
electromagnetic (EM) spectrum
radiowaves
microwaves
infrared
visible light
ultraviolet
X-rays
γ-rays (gamma rays)
red-shifted
coherent
diffraction
fringes
central maximum
diffraction gratings
incident beam
angle of incidence
reflected beam
angle of reflection
transmitted beam
angle of refraction
law of reflection
index of refraction
Snell’s law
refract
dispersion
critical angle
total internal reflection (TIR)
mirror
plane mirrors
real