We have to determine, which element emits photons of highest energy, using the given wavelengths.
The energy of photon is related to its frequency by this formula:
h = Planck's constant (6.626×10–34 J•s)
Certain elements emit light of a specific wavelength when they are burned. Historically, chemists used such emission wavelengths to determine whether specific elements were present in a sample. Some characteristic wavelengths for some of the elements are
|Ag||328.1 nm||Fe||372.0 nm|
|Au||267.6 nm||K||404.7 nm|
|Ba||455.4 nm||Mg||285.2 nm|
|Ca||422.7 nm||Na||589.6 nm|
|Cu||324.8 nm||Ni||341.5 nm|
Which element emits photons of highest energy?
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