Two $12\mathrm{.}0-cm-$long parallel plane mirrors are placed $2\mathrm{.}0$ cm apart, with their refle $45\mathrm{.}0$ angle, measured from the normal. This normal is exactly $1\mathrm{.}0$ cm from the $1$ two mirrors until it reaches the ends of the mirrors and passes out from betwe has reflected

six times and is moving diagonally downward

seven times and is moving diagonally upward

five times and is moving diagonally upward

eight times and is moving diagonally downward