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291. Photonofhighestfrequencywillbeabsorbedwhentransitiontakesplacefrom_____________?
A.1stto5thorbit
B.2ndto5thorbit
C.3rdto5thorbit
D.4thto5thorbit
292. InobtaininganX-rayphotographofourhandweusetheprincipleof______________?
A.photoelectriceffect
B.ionization
C.shadowphotograph
D.anyofabove
293. Whenweexcitesomeatomsbyheatcollisionorelectricaldischargetheywill________________?
A.radiateelectromagneticenergywithacontinuousdistributionofwavelength
B.absorbparticularwavelengthswhenwhitelightisincidentonthem
C.radiateelectromagneticenergyofdiscretecharacteristicwavelength
D.emiteitherinvisibleorvisiblelight
294. WhichoneoffollowingpostulateisinaccordancewiththeRutherfordsmodel?
A.continuousspectraforatoms
B.discretespectraforatoms
C.eithercontinuousnordiscrete
D.nospectrum
295. Groundstateenergyofthe4thorbitinaH-atomis_____________?
A.13.6eV
B.3.4eV
C..85eV
D.1.51eV
296. TheelectricP.Eofanelectroninanorbitatadistancernfromthepositivecharge_____________?
A.Ke2/rn
B.Ke2/rn2
C.ÀKe2/rn
D.ÀKe2/rn2
297. Bracketseriesisobtainedwhenalltransitionofelectronterminateon_______________?
A.4thorbit
B.5thorbit
C.3rdorbit
D.2ndorbit
298. ThepenetratingpowerofX-raysdependsontheir______________?
A.appliedvoltage
B.frequency
C.source
D.alloftheabove
299. Reverseprocessofphotoelectriceffectis_______________?
A.pairproduction
B.Comptoneffect
C.annihilationofmatter
D.X-raysproduction
300. Radiationwithwavelengthlongerthanredlights______________?
A.ultravioletrays
B.X-rays
C.infraredradiation
D.visibleradiation