a seismic ray approaches a layer boundary. which is true $($can be more than $1)$: if the ray refl$4$ects the boundary the angle of incidence will be greater trhan thge angle of relection$2$ the ray becomes more parralell to the layer boundary when it passes into a layer with a higher velocity $3$ the ray beciomnes less parallel to the layer boundary when it passes into the layer with a lower seismic velocity