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Why is it dark under light?

Popularity 1Viewed 846 times 2018-11-5 23:07 |Personal category:education|System category:News

Darkness is always opposite to brightness! It is hard for the young to fully understand this saying (灯下黑) since it has something to do with ancient life! -------------We all think it is always bright if under electric lamp, so where the darkness is under the light?
But in the old days before electricity was invented by human, people burnt kerosene or even food-oil for lighting at night so under the lamp somewhere was really dark!

When I was little such lamp looked like this:it shapes like a milk-bottle which has iron lid through which a thin cotton-rope absorbing the oil inside from the bottom to the upside end where the flame is burning!  
That was nice light-source for me to do homework at night. Once a time the bean-size-like flame burnt my cap and left it a permanent hole for which my classmates often laughed at me!
When you put the bottle-lamp on the desk with the tiny flame burning in the middle of the lid, it is really dark within the area near the bottom of the bottle although it is just under your nose! (Certainly you have no worry about writing  in the light although it is weak if compared with the modern one!)

(This note comes from my comments on other‘s thread. )

(Opinions of the writer in this blog don't represent those of China Daily.)


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Reply Report HailChina! 2018-11-8 05:12
So light travels in straight lines but also scatters everywhere? There is light in shadows? Because of this atmosphere? Is there atmosphere in a deep underground mine? Why won't the light scatter in black darkness? Like in a deep mine?

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  • My kind suggestion to female friends 2019-3-18 18:58

    BlondeAmber: "Female are sensitive to sunlight in afraid of turning the skin ‘dark’!"

    i am sorry you are incorrect - maybe you are speaking about Chin ...
    Like that picture of Anming where she is wearing that red Chinese dress and she looks like an Empress, and she has those perfect beautiful blue eyes and white white skin making then look even more perfect. What could be more beautiful than that? Nothing. And the white skin is critical. White skin is beautiful. Tans are yucky.

  • My kind suggestion to female friends 2019-3-18 18:52

    BlondeAmber: "Female are sensitive to sunlight in afraid of turning the skin ‘dark’!"

    i am sorry you are incorrect - maybe you are speaking about Chin ...
    Consider former CD forum member Anming. Anming is the most beautiful female I have ever seen a photo of and she has nice pale skin. Imagine Anming with one of those horrid spray tans that celebrities were all getting a few years ago. It would be all wrong. Anming looks perfect with nice white skin. White skin is best. And Asians are blessed with nice pale skin. Many are anyway. Why do people say that Asians are yellow anyway? Like hot Japanese chicks with their nice white skin - they look fantastic. If they had a tan it would ruin the whole thing. Their nice dark hair contrast with their pale white skin - its beautiful. A lot of Chinese chicks have the same thing happening. South Koreans too. Paris Hilton looks like she is made of leather with her yucky spray tans. All you tan girls do. Your skin looks like leather. The sun is damaging your skin. Sure get some sun but not enough to make your skin turn brown. I'm not saying that there can't be hot people with black/brown skin - there are plenty - but that's because they are supposed to have black/brown skin and it suits them. They shouldn't get too much sun either though.

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