※ [本文轉錄自 NTU-Exam 看板 #1AEWyxtu ] 作者: hllwo1fkhan (洩阿金老闆) 看板: NTU-Exam 標題: Re: [試題] 97下 黃暉理 普通物理甲 期末考 時間: Thu Jun 18 17:56:10 2009 原po少了兩個圖我幫他補圖 (補圖以紫色表示) [不專業的原po] ------------------------------------------------------------------------------ 課程名稱︰普通物理甲(下) 課程性質︰大一共同必修 課程教師︰黃暉理 開課學院：生農學院 開課系所︰生物產業機電工程學系 考試日期（年月日）︰2009/6/18 考試時限（分鐘）：100分鐘 是否需發放獎勵金：是 （如未明確表示，則不予發放） 試題 : 一、簡答題(9x5=45%) 1. What is meant by "Tranverse Doppler Effect" 2. Explain that how optical fiber transmit signal 3. Light travels in vaccum with wavelenth λ and velocity c. What are the corresponding wavelength and velocity of the light when it is traveling in a medium with refractive index n? 4.The important four electromagnetic laws are gererally known as the Maxwell equations. Yet, curiously enough, Maxwell completely did not have a hand in three of the four equations, with exceptions called the Ampere-Maxwell law. Explain why shoulld these equations called the "Maxwell equations"? 5.Why an incident light changes its phase by π when it is reflected from an interface with higher refraction index? 6.Give a sample explanation of what is meant by Scanning Tunneling Microscope or simply STM? 7.Why Einstein;s theory of "photoelectric effect" is so important? 8.In 1923, Authur Compton successfully demonstrated his well known "Compton scattering" experiment. What has he proved? What is the Compton well length. 9.An electron is trapped in an 1-dimemsional infinite potential well of width b.WRITE down the normalized wave function and the quantized energy levels En 二計算題(4x14=56%) 1. A glas plate(n=1.61)is coverd with a thin uniform layer of oil(n=1.2) A monochromatic light beam in air is incident normally on the oil surface. Observation of the reflected beam shows destructive interference at 500 nm and constructive at 750 nm, with no intervening maxima or minima. What is the thickness if the oil film? │ ─┼─ │ │ ↓ air ───────────────── n = 1.2 oil ───────────────── n = 1.61 glass 2. Assume that the minimum energy needed to extract an electron from a certain metal us 2.20eV (a)What is the threshold frequency of light needed to knock out electrons from the metal surface? (b)What is the maxium kinetic energy of photoelectrons in eV when the surface is illuminated with a light of frequency 8.0x10^14Hz (c)If the stopping potential of the photoelectrons is 0.44V, what is the frequency of incident light? 3.The switch S in the figure is closed at t=0. How long does it take when the current in the inductor reaches ε/2RL? S ┌─→─/\/\/\/\─/ ─┬───┐ │ R1 / │ │ \R2 § │ / § -─- ε \ § L -- / § │ \ │ └──────────────┘ 4.Show that the time for the light to go from A to B is a minimum if n1sinθ1=n2sinθ2 ╲ │ ╲ │ ↘ θ1│ ╲ │ ╲│ n1 ─────┼────── │╲ │ ↘ n2 │θ2 ╲ │ ╲ --

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