In a room, Zephyr and Quinlan are standing on opposite sides of a large, opaque vase that reaches up to their shoulders. If Quinlan holds a helium balloon on a string and releases it, what will happen from Zephyr's perspective? Respond very briefly.
Zephyr will not immediately see the helium balloon when Quinlan releases it because the large, opaque vase obscures Zephyr's line of sight. However, as helium is less dense than air, the balloon will rise. Once the balloon rises above the top edge of the vase, it will come into Zephyr's view. This occurs because the balloon will no longer be blocked by the vase from Zephyr's perspective, and light can travel in a straight line from the balloon to Zephyr's eyes, allowing Zephyr to see the balloon.