This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Pear interaction SEM german.svg de Schematische Darstellung des birnenfrmigen Anregungsbereiches bei der Rasterelektronenmikroskopie und Veranschaulichung der unterschiedlichen Emissionstiefen fr detektierbare Teilchen und Strahlung en This graphic illustrates the pearshaped volume of electrons interaction at the surface of solid