Light and sound are two very different phenomena. However, both exhibit wave characteristics, such as frequency, for sound waves, when the frequency changes, the pitch is affected. Using the diagrams above as a reference, determine how visible light is affected by changes in frequency

Ch4 and ph3 are both covalent since they are composed both of non-metals.    ch4 is non- polar because of  london forces and has a geometry of tetrahedral  ph3 , on the other hand, is umbrella shaped polar and has dipole-dipole intermolecular force (imf) . since ph3 is polar, it has a stronger imf