What is the wavelength of a photon that produces 8.15 x 10 -19 power J of energy?

A photon of energy ℏω is used to excite an electron from some initial state with energy ... by measuring the wavelength dependence of the excitation further from the ... Figure 5 shows PEEM images of 10-μm gold islands on a tantalum substrate ... with an X-ray–focusing monochromator is used to obtain a high-power X-ray.

Explanation:

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indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.

idk what the question is about