1) Will a proton and an electron attract or repel each other? Why?
⇒ attract. 전자는 (-)전하를 띠고 양성자는 (+)전하를 가지기 때문이다.
2) What did the Rutherford expriment demonstrate?
⇒ 금으로 된 얇은 막에 α입자(전자가 제거된 He원자)를 충돌시켰다. 그리고 형광 막을 써서
α입자들이 얼마나 산란되
1. 이 론
분자의 진동 및 분자의 회전은 전자기스펙트럼의 적외선 영역의 빛을 흡수하여 일어나는데 이 빛은 따뜻하게 느껴지기 때문에 열선이라고도 불린다. 적외선의 파장영역에서는 분자내 원자의 진동으로부터 분자 전체의 회전에 의한 흡수스펙트럼이 나타나는데 이와 같이 특정한 작용기의
Ⅰ. 서론
우리인류는 석탄으로 환산하여 매년 90조t이라고 하는 지구에 내리쬐는 태양에너지의 조금1/100,000밖에 이용하지 못한다. 지구상의 36억 인류가 1인당 1년간 25,000t이라는 석탄을 허비하고 있다. 만약 태양에너지의 1%라도 완전히 이용 가능하면 세계의 에너지 부족은 완전히 해소 할 수 있을 것
What is Wireless?
Electromagnetic waves rather than some form of wire or cable
Enable individuals to conduct mobile computing
Wireless – No Wire
Mobile – Changes its location over time
Advantages:
Small enough
Sufficient computing power
Communicative wirelessly
Ⅰ.Title
Solar cells with broad wavelength absorption and their expected efficiency
Ⅲ. Abstract
Recently, the solar cell energy is presently promising field because of energy problems such as oil inflation, fuel exhaustion, global warming and space development. A number of advanced countries have developed the solar cell energy rapidly under a nation enterprise. Of solar cell energy,
The Universe and Dr.Einstein
Content
1. Preface(머리말)
2.1. Birth and Death Albert Einstein
2.2. The electromagnetic spectrum reveals the narrow range of radiation visible to mans eye
2.3. The photoelectric effect was interpreted by Einstein
2.4. The Einstein of Quantum Theory
2.5. Did you know... Brownian Motion
2.6. Theoretical for Special Relativity
2.6.1. Theoretical Basis for Special
THE SAME SCENE; THE SAME SHOTS. Suddenly time RUSHES FORWARD. Als voice squeaks, the action accellerates.
LEADER (VO)
Run past this stuff.
THE VISUALS SPEED EVEN FASTER. SOMEBODY is running the tapes of
the EXPERIMENT right before the attack...FAST FORWARD.
INTRUDER
You wont believe this.
INT. LAB - The INTRUDERS SLOW the tape and watch with interest.
CU.- THE BEAKER on the pedestal surrounded by
Phosphor (Energy Converter)
Inorganic phosphor materials
“Classical” inorganic phosphors usually consist of a host lattice with activator ions doped into it in small concentrations, typically a few mole percent or less.
Host lattice & Activator ion
1st type : weak interaction (Ln3+)
2nd type: strong interaction ( Mn2+, Eu2+, Ce3+, Pb2+,Sb3+, Ce3+, MoO42-, NbO43-)
Activator (+ Sensit