When there is mirage in a desert, which layer of air has a smaller refractive index?
A. The upper hotter layer
B. The upper cooler layer
C. The lower hotter layer
D. The lower cooler layer
Please explain it in Chinese or English. Thanks.
Physics – Refraction of Light
2010-03-31 2:09 am
回答 (2)
2010-03-31 4:08 am
✔ 最佳答案
The answer is CAs mirage happens in desert, the ground is heated up and so the air of the lower part is hotter and upper is cooler
In general,the refractive index has a relationship with density of the material.The higher the density,the higher the refractive index
2010-03-31 4:19 am
The answer is option C.
Mirage normally occurs over deserts. The layer of air in contact with the desert gets hot and becomes less dense. Air above it is cooler and denser. Light from distant object is thus refracted total internally when passing from the layer of cool air to the layer of hot air.
You may wish to look at the following web-page for explanation of mirage formation:
http://phyworld.ed.hkedcity.net/iq/mirage/mirage_e.html
Mirage normally occurs over deserts. The layer of air in contact with the desert gets hot and becomes less dense. Air above it is cooler and denser. Light from distant object is thus refracted total internally when passing from the layer of cool air to the layer of hot air.
You may wish to look at the following web-page for explanation of mirage formation:
http://phyworld.ed.hkedcity.net/iq/mirage/mirage_e.html
收錄日期: 2021-04-23 22:05:29
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100330000051KK03031