The mass of the photon

MOSS-BURSTEIN EFFECT (Expt. B1O) The Moss-Burstein effect results from the Pauli Exclusion Principle and is seen in

semiconductors as a shift with increasing doping of the band-gap as defined as the

separation in energy between the top of the valence band and the unoccupied energy

states in the conduction band. The shift arises because the Fermi energy (EF) lies in the

conduction band for heavy n-type doping (or in the valence band for p-type doping). The

filled states therefore block thermal or optical excitation. Consequently the measured

band gap determined from the onset of interband absorption moves to higher energy (i.e.

suffers "a blue shift").

Provided that the effective masses of the valence and conduction bands are known

reasonably accurately and it is assumed that the curvature and position of the bands are

第一章细胞cytoplasm细胞质property特性the mass of主体be bounded to限制organell细胞器dissolve溶解ion离子soluble可溶解的eukaryotic真核的prokaryote原核的hereditary遗传的nucleoid拟核nucleoli核仁division分裂pore-perforated孔的ribosome核糖体endoplasmic reticulum内质网vacuole液泡lysosome溶酶体mitochondria线粒体plastid质体amino acid氨基酸polysome多聚核糖体lacy花边vesicle小泡steroid类固醇oxidation氧化shunt转轨Prominent突出的phagocytosis吞噬pinocytosis胞饮exocytosis胞吐Subset亚单位degrade降级Cristae嵴Leucoplast白色体pigment色素starch淀粉chromoplast有色体chloroplast叶绿体chlorophyll叶绿素grana基粒stroma子座caroteoid类胡萝素Convoluted盘绕的latticework格子threadlike线状的contractile收缩性actin肌动蛋白Myosin肌球蛋白globular球状的tubulin微管蛋白scaffold脚手架impart给予machanoenzyme机械酶dynein动力蛋白kinesin驱动蛋白Gliding滑行substrate基质

adhere粘附geometry几何chemotaxis趋化性diffuse扩散Propell驱动whiplike鞭子cillia纤毛flagella鞭毛Spindle纺锤体centrioles中心粒basal body 基体

第二章光合作用algae海藻protist原生生物overall总体来说bond键respiration呼吸exergonic释能的 endergonic吸能的 Raw

Solution

Part 1a

a. smVmevaccvsmVmevretv/610044.2/220/610956.1/220 (0.5 pts)

2/acc x ,Ttaccvtretvretx (0.5 pts)

TretvaccvTaccvaccxretx61.11)(2bunch t  (0.3 pts)

.210272.2mbunchtretvb (0.2 pts)

b. The phase difference:

 = 2)(nTtbunch=0.612=220. (1.0 pts)

OR

 = 140

Part 1b

ALLNMn (0.3 pts)

where nL is the number of molecules per cubic meter in the liquid phase

Average distance between the molecules of water in the liquid phase:

3131)()(ALLLNMnd (0.2 pts)

PaV=nRT,

where n is the number of moles (0.6 pts)

MRTNMnMRTMRTVnMPAVVa

where nV is the number of molecules per cubic meter in the vapor phase. (0.9 pts)

3131)()(AaVVNPRTnd (0.2 pts)

12)(31MPRTddaLLV (0.3 pts)

Part 1c

a. (0.5 pts.)

b. Vi >> Vf (0.2 pts)

c. RC/Tife1VV (0.2 pts)

Bohr’s Model

Adith Prabhakar & Mike Barton

Learning Objectives:

Students will explain the structure and makeup of an atom.

Students will describe the concept of electron movement in Bohr’s model.

Students will describe an overview of the functions of models

Assessment Criteria: Homework will be examined for evidence of the following:

 Students’ explanation of the structure and make up of the atom (group model)

should include protons and electrons and neutrons

 Students descriptions of the Bohr model (individual model) will include the key

terms (electrons and protons) and explain why spectra from an atom would be

discontinuous

 Students description of the function of a model should display an understanding

of the dynamic nature of science

Standards

 Illinois State Science Standards:

o 12.C.4b: Analyze and explain the atomic and nuclear structure of matter