Related by context. Frequent words. (Click for all words.) 69 refractive index 59 diffraction 58 parallax 58 reflectivity 55 luminosity 54 reflectance 54 magnification 54 brightness 52 curvature 52 conductance 52 electrical conductivity 52 magnetization 51 conductivity 50 waveguides 50 prisms 50 intensities 49 amplitude 49 photons 49 refractive 49 amplitudes 49 relativistic 49 wavelengths 48 photon 48 fluxes 48 thermal conductivity 48 fluorescence 48 astigmatism 48 apertures 47 aperture 47 metamaterials 47 viscosity 47 albedo 47 quantum mechanical 47 redshift 47 dielectric 47 luminescence 47 excitation 47 μm 47 spatial resolution 47 luminance 46 reflective surfaces 46 dispersion 46 spectroscopic 46 optically 46 spectroscopy 46 velocities 46 micrometer 46 spacetime 46 illumination 46 angular momentum 46 spherical 45 spectra 45 geometries 45 cosmic ray 45 atoms 45 vortices 45 infrared radiation 45 quantum mechanics 45 attenuation 44 interferometer 44 microscopy 44 microstructure 44 blurriness 44 X ray diffraction 44 wavelength 44 spectral 44 vibrational 44 electron 44 logarithmic 44 waveguide 44 nonlinear 44 geometry 44 adaptive optics 44 cloudiness 44 laser pulse 44 roundness 44 thickness 44 dynamical 44 superposition 44 eyepiece 44 deformation 44 infrared wavelengths 43 gravitational 43 fractal 43 radii 43 metamaterial 43 UV 43 fluorescence microscopy 43 millionths 43 femtosecond 43 gravitation 43 nanostructure 43 ionosphere 43 entropy 43 polarity 43 starlight 43 particle size 43 nuclei 43 flatness 43 viewing angle 43 chemical composition