It is an application to perform the calculations associated with the light.
Calculate the time from the distance traveled by the light
Calculate the distance from time
Calculate the frequency from the wavelength of light
Calculate the wavelength from frequency
Calculate the energy of light from the wavelength of light
Calculate the wavelength of energy
Synchrotron radiation facilities such as the ESRF/APS/SPring-8
Calculation in Pico unit is required.
I can be easily calculated with this app in such a case.