What type of cadence can be identified by a resolution from V to vi?

A resolution from V to vi is specifically known as a deceptive cadence. This occurs because the dominant chord (V) traditionally resolves to the tonic chord (I), but instead, it resolves to the submediant (vi). This unexpected shift creates a sense of surprise and deviation from the anticipated resolution, which is characteristic of a deceptive cadence.

In tonal music, the expectation after hearing the dominant is to return to the tonic, making the move to vi an interesting and effective way to create tension and lead to further musical development. This contrasts with other types of cadences which follow more conventional resolutions, specifically moving to I in the case of an authentic cadence, or IV in the case of a plagal cadence. A half cadence, on the other hand, is defined by ending on the V chord, leaving the music unresolved, which also differs from the complete resolution seen in the deceptive cadence.