(35~37)
     Have you ever noticed the full moon looks bigger when it’s near the horizon than when it’s high above?    35.     There are, but the question is which one is right.One of the reasons is the Ebbinghaus illusion（艾賓浩斯錯覺）. The idea is that two circles of the same size will look different because they are affected by the size of the things around them. Take a look at the following examples. Here,   36.    . From this, maybe the moon looks bigger near the horizon because it’s next to small trees, houses, or buildings that are really far away. Then, when the moon is higher up, there is nothing but the moon, so it looks smaller.
        37.     is the Ponzo illusion（龐索錯覺）. The ideabehind this is that our brains will tell us something looks larger than it really is when it is closer to the horizon. For example, the two red lines in the drawing are the same size, but Line A looks longer because it is closer to the horizon.
     In short, the fight over the real reason for the moon illusion is still going on. As long as you can see the moon in the night sky, it will continue.
 horizon 地平線　reason 理由　illusion 錯覺　affect 影響　brain 大腦

【題組】35.
(A) There must be some ways to explain this.
(B) The moon looks smaller when it is not closer.
(C) The full moon may change its size.
(D) People may ask a lot of questions.