Charina says that when waves interact with an object,
they will interfere with the object, and that when waves
interact with other waves, they will reflect off each other.
Do you agree with her? Why or why not?

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