"as light meets matter under scrutiny
electromagnetic spectrum
X-rays
can see through larger layers
ultraviolet
spectroscopies
absorption
reveals age of material based on absorption rate
fluorescence
analyze fluorescence of a sample
can't see above 50 microns
visible radiation
reveals colors
IR radiation
Evidence that painting might be authentic
absence of elements not available at that period
many of the same visual elements
characteristics of his constructivist phase
Evidence that painting is fake
underdrawing
polyene UV absorbance of 0.6