百度试题 结果1 题目 Ultraviolet light of wavelength 350 nm and intensity 1.00 W/m2 is directed at a potassium surface. The maximum kinetic energy of the photoelectrons is ( ) 相关知识点: 试题来源: 解析 3.5 eV 反馈 收藏
Ultraviolet light of wavelength 350 nm and intensity 1.00 W/m2 is directed at a potassium surface.The maximum kinetic energy of the photoelectrons is() A.17.6 eVB.4.42×10-19 JC.3.5 eVD.6.9 eV正确答案:3.5 eV 点击查看答案进入小程序搜题...
LISUN LPCE-2(LMS-9000BUV) integrating sphere UV VIS is used to test the UV lamp (light source) Spectrum, Radiant, Efficiency, CRI, CCT, UVA, UVB, UVC radiant and electric parameters.Spectral Range Wavelength: 200-400nm(UV). The whole system includes the LMS-9000BU...
Controlling the side growth of the domain inverted region during high-voltage pulse application, a uniform nonlinear grating with a period of 1.7 μm and 50% duty cycle was fabricated over 10 mm interaction length in a 150 μm thick LiTaO 3 substrate. A 342 nm wavelength of harmonic ...
light in the wavelength range of 250 to 270nm. Most lamps emit UV irradiation by passing an electrical arc between filaments in a pressurized gas or vapor (typically mercury vapor). Ultraviolet dosage is commonly measured as milliWatt-second persquare centimeter(mW-s/cm2) or milliJoule per ...
doubling frequency doubling waveguide includes a frequency doubling crystal region composed of beta-BaB2O4 (beta-BBO), a cladding region composed of materials that are transparent or nearly transparent at the wavelength of the ultraviolet laser light beam and a supporting substrate composed of any ...
Swift typically utilises one or more of the UV filters when monitoring novae: 𝑢𝑣𝑤1uvw1 (central wavelength, 𝜆𝑐λc = 2600 Å; Full Width at Half Maximum, FWMH = 693 Å), 𝑢𝑣𝑚2uvm2 (𝜆𝑐λc = 2246 Å; FWHM = 498 Å) and 𝑢𝑣𝑤2uvw2 (𝜆𝑐...
Ultraviolet radiation,that portion of the electromagnetic spectrum extending from the violet, or short-wavelength, end of the visible light range to the X-ray region. Its wavelengths are between 400 and 10 nanometers. Learn more about ultraviolet radiati
past a given point in a unit of time. Frequency is expressed in hertz (Hz). Wavelength and frequency are inversely proportional, and are related by λ=c/ν, where c is the speed of light. Thus, as the wavelength of the electromagnetic radiation increases, the corresponding frequency ...
关键词: light emitting diodes surface roughness encapsulation photon extraction efficiency power 20 mW pseudomorphic ultraviolet light emitting diode substrate thinning surface roughening ultraviolet LED wavelength 260 nm 会议名称: 2012 Conference on Lasers and Electro-Optics (CLEO) 主办单位: IEEE ...