You would think that since E-mail is electronic and electronic information is suppose to move at the speed of light, your E-mail message would arrive seconds after you send it.

你可能会这么想：既然电子邮件是“电子的”而且电子信息是以光速传播，那么电子邮件应该会在发出的几秒后到达目的地。

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A very small fraction of the Sun's light and heat is emitted in such directions that after passing unhindered through interplanetary space, it hits the Earth.

只有很小一部分太阳的光和热由此方向释放出来，并且未被阻挡，穿越星空，来到地球。

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After that is the transition region a few hundred to a few thousand miles or kilometers thick, which is heated by the corona above it and sheds most of its light as ultraviolet rays.

在这之外是厚度为几百到几千公里的过渡区，它由在其上的日冕加热，并发射大部分光和紫外线。

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For those looking for something a little more conventional, Acer has also unveiled its new TravelMate ProFile laptop design (check it out after the break), which is also light on specs at the moment but does promise some increased sturdiness while still keeping the weight down.

ENGADGET: Acer reveals Gemstone, TravelMate ProFile laptop designs

Light-based communication seems to wind throughout the MIT Media Lab -- it is a universal language, after all, since many devices output light, be it with a dedicated LED or a standard LCD, and have the capacity to view and interpret it.

ENGADGET: Droplet and StackAR bring physical interface to virtual experiences, communicate through light (hands-on)