Although the cavity is clearly approximately spherical , the system can be modeled , approximately , as a particle in a cubic box . Assume that the solvated electron absorbs red light at 630 Am as the electron makes a transition from n = = n, = 1 to n = = 1 ; n, = 2 . What is the length of the cavity ? Does this length make sense ? Imagine that rather than an electron , you were able to prepare this material using a muon ( muons have the same charge as an electron , but have a mass of 1. 88 x 10-20 KG ) . Describe both qualitatively and quantitatively any changes that would occur