Main Question or Discussion Point
How wavelength of photon is measured experimentally?
I want more detailsThe wavelength of light can be determined from the interference pattern that is created from two-slit interference, and much more precisely by the interference pattern that results from a diffraction grating using a diffraction-grating based spectrometer that has a grating with hundreds and/or thousands of equally spaced lines/grooves: For both two two-slit interference, and for a grating with many lines, ## m \lambda= d \sin(\theta) ## for the location of the primary interference maxima, but the measurement with a many-line grating is far more precise.
Please give a couple of sentences or more then of what you are looking for. You are asking one sentence questions. If you would read my first reply carefully, and perhaps google things like two-slit interference, it already is quite detailed.I want more details