  The reflection, refraction, and transmission of large-scale extreme
ultraviolet (EUV) waves (collectively, secondary waves) have been observed
during their interactions with coronal structures such as active regions (ARs)
and coronal holes (CHs). However, the effect of the total reflection of EUV
waves has not been reported in the literature. Here, we present the first
unambiguous observational evidence of the total reflection of a quasi-periodic
EUV wave train during its interaction with a polar CH. The event occurred in
NOAA AR 12473, located close to the southeast limb of the solar disk, and was
characterized by a jet-like CME. In this study, we focus in particular on the
driving mechanism s of the quasi-periodic wave train and the total reflection
effect at the CH boundary. We find that the periods of the incident and the
reflected wave trains are both about 100 seconds. The excitation of the
quasi-periodic wave train was possibly due to the intermittent energy release
in the associated flare since its period is similar to that of the
quasi-periodic pulsations in the associated flare. Our observational results
showed that the reflection of the wave train at the boundary of the CH was a
total reflection because the measured incidence and critical angles satisfy the
theory of total reflection, i.e., the incidence angle is less than the critical
angle.
