create spectrum graphic

diff --git a/physics/graphics/sinx^2.png b/physics/graphics/sinx^2.png
new file mode 100644 (file)
index 0000000..2f8b024
Binary files /dev/null and b/physics/graphics/sinx^2.png differ

diff --git a/physics/graphics/spectrum.png b/physics/graphics/spectrum.png
new file mode 100644 (file)
index 0000000..3af1b23
Binary files /dev/null and b/physics/graphics/spectrum.png differ

diff --git a/physics/graphics/spectrum.xcf b/physics/graphics/spectrum.xcf
new file mode 100644 (file)
index 0000000..553697d
Binary files /dev/null and b/physics/graphics/spectrum.xcf differ

diff --git a/physics/graphics/vis-spectrum.jpg b/physics/graphics/vis-spectrum.jpg
new file mode 100644 (file)
index 0000000..357a187
Binary files /dev/null and b/physics/graphics/vis-spectrum.jpg differ