Assertion: wave | /r/CapableOf | enter medium
Facets:
value: at an angle
type: MANNER
Source sentences:
text: In refraction, a wave bends when it enters a medium through which it has a different speed.
text: When a wave enters at an angle a medium through which its speed would be slower, the wave is bent toward the perpendicular.
text: When a wave enters at an angle a medium in which its speed would be increased, the opposite effect happens.