英语翻译28 Parallel wave fronts incident on an opening in abarrier are diffracted.For which combination ofwavelength and size of opening will diffractioneffects be greatest?(1) short wavelength and narrow opening(2) short wavelength and wide open

英语翻译28 Parallel wave fronts incident on an opening in abarrier are diffracted.For which combination ofwavelength and size of opening will diffractioneffects be greatest?(1) short wavelength and narrow opening(2) short wavelength and wide open
英语翻译
28 Parallel wave fronts incident on an opening in a
barrier are diffracted.For which combination of
wavelength and size of opening will diffraction
effects be greatest?
(1) short wavelength and narrow opening
(2) short wavelength and wide opening
(3) long wavelength and narrow opening
(4) long wavelength and wide opening
32 A photon of light traveling through space with a
wavelength of 6.0 × 10–7 meter has an energy of
(1) 4.0 × 10–40 J (3) 5.4 × 1010 J
(2) 3.3 × 10–19 J (4) 5.0 × 1014 J
34 The charge of an antistrange quark is
approximately
(1) +5.33 × 10–20 C (3) +5.33 × 1020 C
(2) –5.33 × 10–20 C (4) –5.33 × 1020 C
35 What fundamental force holds quarks together
to form particles such as protons and neutrons?
(1) electromagnetic force
(2) gravitational force
(3) strong force
(4) weak force
39 What is the magnitude of the force needed to keep a 60.-newton rubber block moving across level,dry
asphalt in a straight line at a constant speed of 2.0 meters per second?
(1) 40.N (3) 60.N
(2) 51 N (4) 120 N
50 What is the wavelength of a light ray with frequency 5.09 × 1014 hertz as it travels through Lucite?
(1) 3.93 × 10–7 m (3) 3.39 × 1014 m
(2) 5.89 × 10–7 m (4) 7.64 × 1014 m
51 What is the total number of quarks in a helium nucleus consisting of 2 protons and 2 neutrons?
(1) 16 (3) 8
(2) 12 (4) 4
6.0 m
0.20 m
–0.20 m

英语翻译28 Parallel wave fronts incident on an opening in abarrier are diffracted.For which combination ofwavelength and size of opening will diffractioneffects be greatest?(1) short wavelength and narrow opening(2) short wavelength and wide open
28事件对战线平行波打开一个障碍是衍射.其中波长组合和规模最大的开放将是衍射效应?(1)短波、缩小开幕(2)短波长、宽、长波长开幕(3)(4)长窄开幕 32、广开一个光子波长光穿过空间与波长6.0×10-7米 (一)具有能量4.0×5.4(3)10-40十1010×330×(2)十(4)十10-19 5.0×34014十一个反奇异夸克电荷约为5.33×10-20(1)三(3)5.33 三(2)1020××10-20-5.33-5.33三(4)35×1020三夸克合计持有什么根本力量 形成质子和中子等粒子?(1)(2)引力电磁力(3)(4)强大的力量薄弱,是什么力量39力量幅度 要保持60.牛顿橡胶块迁入级 干燥沥青一条直线时时速每秒2.0米?(一)40.氮(3)60.氮(2)51(4)氮氮50120什么是光线波长的频率×5.09 1014赫兹因为驾驶员通过有机玻璃?(1)(3)3.93×10-7米×014米(2)3.395.897.64×10-7米×014米(4) 共有51所,在氦核内夸克组成质子和22中子?(1)16(3)8(2)12(4)4米6.0米0.20米-0.40+0.60DC