D라이브러리

Search will be divided into two parts. First, there will be a fairly close investigation of 1,000 stars all within 100 light-years of Earth. Secondly, there will be a broader survey of the entire sky.The Search will use several large telescopes located in the Western world. It is here that the Soviet offer would be handy. Not only would it supply additional radio telescopes but the Soviet ...

따른 공간의 허용치가 크다는 것이 단점이다. 이러한 홀로그램에는 레이저와 백색광(white light) 홀로그램이 있다. 레이저 홀로그램은 단지 마스터(master) 홀로그램을 제작하는데 사용되는데 입체효과, 시차효과(보는 방향에 따라 상이 다르게 보이는 현상)가 뛰어나다. 백색광(white light) 홀로그램은 ...

보편화돼 마우스의 사용이 더욱 활성화되고 있다.위치를 입력하는 장치로서 전자펜(light pen)이 또한 사용된다. 전자펜은 우리가 일상적으로 사용하고 있는 연필과 같이 생겼는데 화면상에 직접 위치를 지적할 수 있는 장점이 있다. 터치스크린(touch screen)은 전자펜과 같은 특수장치가 아니라 손가락, ...

unusual.Incidentally, the luminous object was missed the first time around. The research team was studying visible light counterparts to faint infrared sources that had been detected in 1983 by the Infrared Astronomical Satellite (IRAS).Two years ago, on the last night of a survey, they thought they had their instruments trained on an infrared source, but as it happened, another object fell on ...

than old stars die, the light of the universe will gradually fade until there is so much darkness and so little light and heat that life will be impossible anyway?Or will the universe undergo other changes still?These questions are the sort that fascinate astronomers.(C) 1991, Los Angeles Times ...

during a total eclipse, they got certain displacements because the sun's gravitation pulled at and curved the beam of light. The displacements agreed with what Einstein had predicted.Einstein was asked, "How would you have felt if the displacements did not agree?"Einstein answered, "I would have been sorry for the Lord God, for the theory is right."One of the fundamental bases of the theory ...

it turned out that light from the near end of the ring first reached us 80 days after the supernova explosion. The light from the far end of the ring didn't reach us till 340 days after the supernova explosion.Allowing for the tilt of the ring, and the rate at which the ring has been expanding since the days of the supernova explosion, astronomers are able to determine that its real ...

by the enormous light they radiate and even more so by their radio waves. The radio waves have all the properties of light waves and they, too, can be bent.Suppose, then, that exactly between a distant quasar and ourselves is something massive that can bend the radio waves of the quasar and focus them in Earth's vicinity. We could see the quasar not as the usual little smudge of radiation but ...

전자시계, TV화면에 이용되는 액정화면(LCD)을 세계 최초로 개발해냈다. 이 LCD는 기존의 LED(Light Emitting Diode, 발광다이오드)에 비해 두배나 얇을 뿐 아니라 전력소모량도 극히 적어 LED에 사용할 경우 3~6시간 이상을 쓰지 못하는 전지로 1천시간이상을 쓸 수 있게 됐다. 또 LCD는 LED보다 글자를 표현해내는 ...