1.The spectrum of the hydrogen atom in the visible range is

频谱共享

>> t=-10:0.001:10;
>> x=10*cos(800*pi*t+pi/4)+7*cos(1200*pi*t-pi/3)-3*cos(1600*pi*t);
>> X=fftshift(fft(x));
>> fs=linspace(-1000/2,1000/2,length(t));%%1000是由0.001而来,采样间隔
>> plot(fs,abs(X));
grid on

百♂♂♂度 - 中级魔法师 四级
错16.像可见光谱,原子发射光谱是一个持续不断
各种颜色.
对 17.每个元素都有一个独特的原子发射光谱.
对18.火焰测试可用于识别在某些分子的存在
复合.
对19.事实上,只有特定的颜色在一个元素的原子发射出现
光谱表明,只有根据某些频率的发射.
对20.原子发射光谱可以解释光的波模型.
不一定 错21.在霓虹灯的氖原子发出的光的特征颜色
它们吸收的能量.
错22.当原子发出光,光子具有某些具体的精力
正在排放的.

Langmuir做单位的有.
在表面科学中,用L(langmuir)表示气体在样品表面的暴露量,定义：
1L = 10-6(负6次方)torr （1torr等于1毫米汞柱压强=133P）
当系统压力为10-6 torr ,通入某气体的时间为1秒,则暴露量为1L

上个月,一项发表在CNS光谱宣称是第一个大规模看看过度使用网络.
CNS是缩写.

前一个them指spectral lines
后一个they也是指spectral lines

复数是spectra/spectrums.
如果你看到拿spectrum当复数用,那文献错了.

N. A. Erol is with Spectrum Signals Inc., Burnaby,
BC V5A 4X1, Canada.
NA埃罗与光谱信号公司，本拿比，公元前v5a
4x1，加拿大。
Publisher
Item Identifier S 1083-4435(00)07829-7.
出版项标识符的1083-4435（00）07829-7。
求采纳

门厅的一头,你无违约零息债券.

汤姆森路透社CDA /频谱机构持有的数据

1氢原子的可见光谱由一系列行是随机的间隔.
2.When的elementsC,氮,硅在提高评审工作arranfed第一电离能,这是正确的订单的订单?
那间是量子数在地面磷态原子价电子可能的呢?
四线谱氢原子提供了能态量子性质的证据.
5.What是未配对电子在锰原子数的最低能源statea?
朗读
1.氢原子的可见光谱由一系列不连续的线状光谱组成.
2.句子中rae arranfed in order of 应该有一些拼写问题,句子前面是指C、N和Si元素,后面提到了第一电离能.
3.哪一个(答案)可能是基态磷原子价子电的量子数的组成?
4.氢线光谱为原子能级的量子特性提供了证据.
5.锰原子处在最低能级时未成对的电子数目是多少?

高效广谱

(a)
For wave with wavelength of 372.3 nm
Frequency = c/λ1=8.06×10^14 Hz
For wave with wavelength of 722.3 nm
Frequency =c/λ2=4.153×10^14 Hz
(b)
Answer :v = c/n =1.923× 10^8 m/s
(c)
For wave with original wavelength of 372.3 nm
New wavelength = λ1/n=238.65 nm
For wave with original wavelength of 722.3 nm
New wavelength =λ2/n=463.013 nm

如果那些坚固的长钉正在光谱在22千赫兹里

analyzing the EDS composition of above samples,the result as shown in Figure 5.Observe the basical body at Spectrum 1 in Figure 5(a),black phases can be seen in the gray basical body.Combining the result of XRD analysis,hardness test and EDS composition anlysis,we can judge that :the gray basical body shown in Fig.5 (a)and (b) is composed of NiAl intermetallic compounds and Al2O3 ceramic phases,in which the dark gray phases are NiAl intermetallic compounds with no display of grainboundary,while the black phases are Al2O3 in irregular shape; the white particles in regular shape shown in Fig.5(C)are all TiB2.TiB2 is of great morphological diversity,including cube hexahedron,six - sided prism,or bar shape.the minimum size of a comprehensive particle is 5 μm,mainly inserted in the irregular AI203 phases,while some were distributed onto the basical body sized 10 μm.
The AI particles are with comparetively bigger size of 70~230 mm among the reaction mixture,however,the TiB2 particles generated by reaction were very small,mostly are smaller than 5 μm and clustered on the basical body of Al2O3.Thus,we deducted that Al2O3 and TiB2 have grown together.The size of the clustered TiB2 is 10~20 mm,which is far less smaller than the size of AI particles.For the molar ratio of 1:1 NiAl system to initiate reaction under room temperature,the adiabatic temperature is Tad=Tm,NiAl=1 911 K [19]; while the molar ratio of 10:3:3 AlTiO2B2O3 system to initiate reaction under room temperature,the adiabatic temperature is Tad=2 448 K [20].Preheating the samples under 300 ℃,and calculate the adiabatic temperature of hybrid system NiAl+AlTiO2B2O3 according to the thermodynamic data provided in Ref.[21],with the amount content of AlTiO2B2O3 increasing,the adiabatic temperature rises.When the mass fraction of AlTiO2B2O3 increases from 10% to 30%,the Tad rises from 2648K to 2723K,which is between the Melting point of Al2O3 and TiB2.