點解我望住1個人既時候,個個人會feel到我望住佢既?

呢樣野其實係關angle of elevation事

係phy的野....
死啦我呢D半桶水好難詳細講解。

俾你的email我啦
如果我找回我f3的phy text bk
裡面有個diagram係兩個人互睥

a: Why are you looking at me?
b: If you are not looking at me, why do you know that I am looking at you?

呢個無聊的diagram後有很詳細的angle of elevation 的explanation

因為有人love你,時時see你,