【英语翻译28Parallelwavefrontsincidentonanopeninginabarrierarediffracted.Forwhichcombinationofwavelengthandsizeofopeningwilldiffractioneffectsbegreatest?(1)shortwavelengthandnarrowopening(2)shortwavelengthandwideopen】
英语翻译
28Parallelwavefrontsincidentonanopeningina
barrierarediffracted.Forwhichcombinationof
wavelengthandsizeofopeningwilldiffraction
effectsbegreatest?
(1)shortwavelengthandnarrowopening
(2)shortwavelengthandwideopening
(3)longwavelengthandnarrowopening
(4)longwavelengthandwideopening
32Aphotonoflighttravelingthroughspacewitha
wavelengthof6.0×10–7meterhasanenergyof
(1)4.0×10–40J(3)5.4×1010J
(2)3.3×10–19J(4)5.0×1014J
34Thechargeofanantistrangequarkis
approximately
(1)+5.33×10–20C(3)+5.33×1020C
(2)–5.33×10–20C(4)–5.33×1020C
35Whatfundamentalforceholdsquarkstogether
toformparticlessuchasprotonsandneutrons?
(1)electromagneticforce
(2)gravitationalforce
(3)strongforce
(4)weakforce
39Whatisthemagnitudeoftheforceneededtokeepa60.-newtonrubberblockmovingacrosslevel,dry
asphaltinastraightlineataconstantspeedof2.0meterspersecond?
(1)40.N(3)60.N
(2)51N(4)120N
50Whatisthewavelengthofalightraywithfrequency5.09×1014hertzasittravelsthroughLucite?
(1)3.93×10–7m(3)3.39×1014m
(2)5.89×10–7m(4)7.64×1014m
51Whatisthetotalnumberofquarksinaheliumnucleusconsistingof2protonsand2neutrons?
(1)16(3)8
(2)12(4)4
6.0m
0.20m
–0.20m