Everythng look different??

W: At first I thought this cloth was yellow but now it looks green to me.
M: You were right the first time. It is this blue light in the store that makes everything look different.
Q: According to the man what color is the cloth?


第二句,為什麼 it is this blue light....點解唔用 It is blue in the store...
第三句 怎樣解,,答案是否綠色...