When a table tennis ball falls from a high altitude, the height of each bounce is (2/5) of the height of the fall. If it falls from a height of 25 meters, then it bounces and then falls. After at least a few bounces, its bounce height is less than 0.5 rice?
乒乓球的高空落下，每次弹起的高度是落下的高度的(2/5)，如果从25米的高度落下，那么弹起后再落下，至少弹几次后它的弹起高度不足0.5米？
<result>0.5</result>