PHYS1600 MIDTERM #2 REVIEW QUESTI
CORRECT ANSWERS
One cof cthe cfollowing cstatements cis cnot ccorrect; cwhich cone?
The cwavelength cof cinfrared cis cshorter cthan cthat cof cvisible clight.
The cwavelength cof cradio cwaves cis clonger cthan cthat cof cvisible clight.
The cwavelength cof cultraviolet cis cshorter cthan cthat cof cvisible clight.The cwavelength cof cinfrared cis
clight. c- cCORRECT cANS✔✔The cwavelength cof cinfrared cis cshorter cthan cthat cof cvisible clight.
The cfigure cshows cthree cblackbody cspectra. cMatch cthe clabels cA, cB, cC cwith cthe ctemperatures c
cassociated cwith cthe ctemperature).
1500K
2000K
2500K c- cCORRECT cANS✔✔1500K c- clowest
2000K c- cmiddle
2500K c- chighest
The cfigure cshows cthe cemission cspectrum cof csome celement ctaken cin cthe claboratory cand cthe ca
cthat chave cthat celement cin ctheir catmosphere. cWhich cstar cis cneither cmoving ctoward cus cor cawa
cANS✔✔Neither cmoving ctoward cor caway cfrom cus c- cmatches cthe clab csample
Electromagnetic cradiation
is climited cto cwavelengths cnear cto cthose cof cvisible clight, cfrom cultraviolet cto cinfrared cradiation. cA
crange c(e.g., cX crays, cradio) care cNOT c
true celectromagnetic cradiations.
has cno cwavelength climits, ceither clong cor cshort.
is climited cto cwavelengths cshorter cthan cradio cwaves cof cabout c1 cmeter cin clength. c- cCORRECT
climits, ceither clong cor cshort
, radio cwaves chave clonger cwavelength cthan clight cwaves
radio cwaves care celectromagnetic, cwhereas clight cwaves care cnot c- cCORRECT cANS✔✔radio cwa
cthan clight cwaves
One cof cthe cfollowing cstatements cis cnot ccorrect; cwhich cone?
The cwavelength cof cultraviolet cis clonger cthan cthat cof cvisible clight.
The cwavelength cof cinfrared cis clonger cthan cthat cof cvisible clight.
The cwavelength cof cradio cwaves cis clonger cthan cthat cof cvisible clight. c- cCORRECT cANS✔✔The
clonger cthan cthat cof cvisible clight.
The cfigure cshows cthe cemission cspectrum cof csome celement ctaken cin cthe claboratory cand cthe ca
cthat chave cthat celement cin ctheir catmosphere. cWhich cstar(s) cis/are cmoving ctoward cus? c- cCORR
cus c- cblueshifted c(samples cshifted cto cleft cof clab csample)
Violet clight cdiffers cfrom cred clight cin cthat: c- cCORRECT cANS✔✔violet clight chas ca cshorter cwave
When ca cpiece cof csteel cis cheated, cthe cwavelength cof cpeak cintensity cof cthe celectromagnetic cra
cCORRECT cANS✔✔change cfrom cinfrared, cthrough cvisible, cto cultraviolet.
In c1868, castronomers cobserved ca cspectral cline cin cthe cSun cat ca cwavelength cwhere cthey chad c
cbefore cin cglowing csources con cEarth. calthough, cother cspectral clines cwere cwhere cthey cwere cex
cconclusion cthat cthey ceach cbased con cthis cobservation cwas cthat c- cCORRECT cANS✔✔they chad
cundiscovered celement.
The cspectrum cof cthe cSun cshows ca cseries cof cdark cabsorption clines cof chydrogen, csuperimpose
cof clight. cWhat cconclusion ccan cbe cdrawn cfrom cthis cobservation? c- cCORRECT cANS✔✔Cooler c
cthe chot csolar csurface cto cproduce cabsorption clilies.
How cdoes cthe cwavelength cof cvisible clight ccompare cto cthe cwavelengths cof cother cforms cof celec
cCORRECT cANS✔✔Longer cthan cX crays cbut cshorter cthan cradio cwaves
One cof cthe cfollowing cstatements cis cnot ccorrect; cwhich cone?
The cwavelength cof cradio cwaves cis cshorter cthan cthat cof cvisible clight.
The cwavelength cof cultraviolet cis cshorter cthan cthat cof cvisible clight.
The cwavelength cof cinfrared cis clonger cthan cthat cof cvisible clight. c- cCORRECT cANS✔✔The cwav
cshorter cthan cthat cof cvisible clight.
The cfigure cshows cthe cemission cspectrum cof csome celement ctaken cin cthe claboratory cand cthe ca
cthat chave cthat celement cin ctheir catmosphere. cWhich cstar(s) cis/are cmoving caway cfrom cus? c- cC
caway cfrom cus c- credshifted c(shifted cright cfrom cthe clab csample)
Compared cto cthat cof cblue clight, cthe cwavelength cof cred clight cis c- cCORRECT cANS✔✔longer
If can cobject cis ca cperfect cblackbody cthen c- cCORRECT cANS✔✔it cemits cno cenergy.
When cheated cin ca cflame, csmall cquantities cof cdifferent cchemical celements cemit clight cin cnarrow
c"spectral cline" cemissions. cThe cpattern cof' cthese cemission clines cas ca cfunction cof cwavelength c-
CORRECT ANSWERS
One cof cthe cfollowing cstatements cis cnot ccorrect; cwhich cone?
The cwavelength cof cinfrared cis cshorter cthan cthat cof cvisible clight.
The cwavelength cof cradio cwaves cis clonger cthan cthat cof cvisible clight.
The cwavelength cof cultraviolet cis cshorter cthan cthat cof cvisible clight.The cwavelength cof cinfrared cis
clight. c- cCORRECT cANS✔✔The cwavelength cof cinfrared cis cshorter cthan cthat cof cvisible clight.
The cfigure cshows cthree cblackbody cspectra. cMatch cthe clabels cA, cB, cC cwith cthe ctemperatures c
cassociated cwith cthe ctemperature).
1500K
2000K
2500K c- cCORRECT cANS✔✔1500K c- clowest
2000K c- cmiddle
2500K c- chighest
The cfigure cshows cthe cemission cspectrum cof csome celement ctaken cin cthe claboratory cand cthe ca
cthat chave cthat celement cin ctheir catmosphere. cWhich cstar cis cneither cmoving ctoward cus cor cawa
cANS✔✔Neither cmoving ctoward cor caway cfrom cus c- cmatches cthe clab csample
Electromagnetic cradiation
is climited cto cwavelengths cnear cto cthose cof cvisible clight, cfrom cultraviolet cto cinfrared cradiation. cA
crange c(e.g., cX crays, cradio) care cNOT c
true celectromagnetic cradiations.
has cno cwavelength climits, ceither clong cor cshort.
is climited cto cwavelengths cshorter cthan cradio cwaves cof cabout c1 cmeter cin clength. c- cCORRECT
climits, ceither clong cor cshort
, radio cwaves chave clonger cwavelength cthan clight cwaves
radio cwaves care celectromagnetic, cwhereas clight cwaves care cnot c- cCORRECT cANS✔✔radio cwa
cthan clight cwaves
One cof cthe cfollowing cstatements cis cnot ccorrect; cwhich cone?
The cwavelength cof cultraviolet cis clonger cthan cthat cof cvisible clight.
The cwavelength cof cinfrared cis clonger cthan cthat cof cvisible clight.
The cwavelength cof cradio cwaves cis clonger cthan cthat cof cvisible clight. c- cCORRECT cANS✔✔The
clonger cthan cthat cof cvisible clight.
The cfigure cshows cthe cemission cspectrum cof csome celement ctaken cin cthe claboratory cand cthe ca
cthat chave cthat celement cin ctheir catmosphere. cWhich cstar(s) cis/are cmoving ctoward cus? c- cCORR
cus c- cblueshifted c(samples cshifted cto cleft cof clab csample)
Violet clight cdiffers cfrom cred clight cin cthat: c- cCORRECT cANS✔✔violet clight chas ca cshorter cwave
When ca cpiece cof csteel cis cheated, cthe cwavelength cof cpeak cintensity cof cthe celectromagnetic cra
cCORRECT cANS✔✔change cfrom cinfrared, cthrough cvisible, cto cultraviolet.
In c1868, castronomers cobserved ca cspectral cline cin cthe cSun cat ca cwavelength cwhere cthey chad c
cbefore cin cglowing csources con cEarth. calthough, cother cspectral clines cwere cwhere cthey cwere cex
cconclusion cthat cthey ceach cbased con cthis cobservation cwas cthat c- cCORRECT cANS✔✔they chad
cundiscovered celement.
The cspectrum cof cthe cSun cshows ca cseries cof cdark cabsorption clines cof chydrogen, csuperimpose
cof clight. cWhat cconclusion ccan cbe cdrawn cfrom cthis cobservation? c- cCORRECT cANS✔✔Cooler c
cthe chot csolar csurface cto cproduce cabsorption clilies.
How cdoes cthe cwavelength cof cvisible clight ccompare cto cthe cwavelengths cof cother cforms cof celec
cCORRECT cANS✔✔Longer cthan cX crays cbut cshorter cthan cradio cwaves
One cof cthe cfollowing cstatements cis cnot ccorrect; cwhich cone?
The cwavelength cof cradio cwaves cis cshorter cthan cthat cof cvisible clight.
The cwavelength cof cultraviolet cis cshorter cthan cthat cof cvisible clight.
The cwavelength cof cinfrared cis clonger cthan cthat cof cvisible clight. c- cCORRECT cANS✔✔The cwav
cshorter cthan cthat cof cvisible clight.
The cfigure cshows cthe cemission cspectrum cof csome celement ctaken cin cthe claboratory cand cthe ca
cthat chave cthat celement cin ctheir catmosphere. cWhich cstar(s) cis/are cmoving caway cfrom cus? c- cC
caway cfrom cus c- credshifted c(shifted cright cfrom cthe clab csample)
Compared cto cthat cof cblue clight, cthe cwavelength cof cred clight cis c- cCORRECT cANS✔✔longer
If can cobject cis ca cperfect cblackbody cthen c- cCORRECT cANS✔✔it cemits cno cenergy.
When cheated cin ca cflame, csmall cquantities cof cdifferent cchemical celements cemit clight cin cnarrow
c"spectral cline" cemissions. cThe cpattern cof' cthese cemission clines cas ca cfunction cof cwavelength c-
