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Astronomyl 207/l ASTRl 207l Midterml 3l Examl -l (Latestl 2026/l 2027l Update)l 100%l Verifiedl Questionsl &l Answersl |l Gradel A
Q:l Whichl ofl thel followingl telescopesl isl bestl suitedl forl studyingl thel hottestl intergalacticl gasl (10l millionl K)l inl al clusterl ofl galaxies?l
Answer:
Chandral X-rayl Telescope
Q:l Whichl ofl thel followingl bestl describesl whatl wel meanl byl thel focall planel ofl al telescope?l
Answer:
Itl isl thel placel where,l ifl wel mountedl filml orl anl electronicl detector,l wel couldl getl al clearl (notl blurry)l imagel ofl anl objectl viewedl throughl thel telescope
Q:l Whatl doesl angularl resolutionl measure?l
Answer:
thel angularl sizel ofl thel smallestl featuresl thatl thel telescopel canl see
Q:l Whatl dol wel meanl byl thel diffractionl limitl ofl al telescope?l
Answer:
Itl isl thel angularl resolutionl thel telescopel couldl achievel ifl nothingl besidesl thel sizel ofl itsl light-collectingl areal affectedl thel qualityl ofl itsl images
Q:l Supposel youl wantl tol determinel thel chemicall compositionl ofl al distantl planetl orl star.l Whichl ofl thel followingl willl bel mostl usefull tol have?l 1 / 2
Answer:
highl spectrall resolution
Q:l Whatl dol astronomersl meanl byl lightl pollution?l
Answer:
lightl froml humanl sourcesl thatl makesl itl difficultl tol seel thel starsl atl night
Q:l Whatl isl thel purposel ofl adaptivel optics?l
Answer:
Itl reducesl blurringl causedl byl atmosphericl turbulencel forl telescopesl onl thel ground
Q:l Whyl doesl thel Sun'sl imagel lookl distortedl inl shapel atl sunset?l
Answer:
becausel ofl thel wayl airl affectsl thel pathsl ofl light
Q:l Supposel youl havel twol smalll photographsl ofl thel Moon.l Althoughl bothl lookl thel samel atl smalll size,l whenl youl blowl theml upl tol posterl sizel onel ofl theml stilll looksl sharp,l whilel thel otherl onel becomesl fuzzyl (grainy)l looking.l Whichl ofl thel followingl statementsl isl true?l
Answer:
Thel onel thatl stilll looksl sharpl atl largel sizel hasl betterl (smaller)l angularl resolutionl thanl thel onel thatl looksl fuzzy
Q:l Thel light-collectingl areal ofl anl 8-meterl telescopel isl ________l timesl thatl ofl al 2- meterl telescope.l
Answer:
16
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