In which one of the following pairs of experimental observations and phenomemnon does the experimental observation correctly account for phenomenon does the experimental observation correctly account for phenomenon

Options

A. `{:("Experimental observation","Phenomenon"),("X-ray spectra","Charge on the nucleus"):}`
B. `{:("Experimental observation","Phenomenon"),(alpha"-particle scattering","Quantized electron orbit"):}`
C. `{:("Experimental observation","Phenomenon"),("Emission spectra","The quantization of energy "):}`
D. `{:("Experimental observation","Phenomenon"),("The photoelectric effect","The nuclear atom"):}`

Answer

C

Explanation

Emission spectra of different `lambda` accounts for quantisation of energy