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Final Exam Study Questions
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Preguntas del test (39)
1Which of the following is correct for 3.6x10^2 + 5.0x10^2?
- A4.1x10^2
- B8.6x10^2
- C8.6x10^4
- D18.0x10^2
2Which of the following is correct for 6.8x10^5/3.4x10^4?
- A2.0x10^4
- B2.0x10^-6
- C2.0x10^6
- D2.0x10^-4
3Which of the following is correct for 1.5x10^2 + 3.0x10^-1?
- A1.503x10^2
- B1.53x10^2
- C4.5x10^2
- D4.5x10^-1
4What is the energy of a visible light photon with wavelength at 800 nm?
- A2.5x10^-19 joule
- B5.0x10^-20 joule
- C6.6x10^-19 joule
- D2.5x10^-18 joule
5Which of the following photon has a wavelength similar to a football field
- Agamma rays
- Bultraviolet
- Cvisible
- Dradio
6Which of the following light carries the most energy?
- Aultraviolet
- Bvisible
- Cinfrared
- Dradio
7When we observe a spectrum of a star, which of the following spectrum can be detected
- Acontinuous spectrum
- Babsorption spectrum
- Cemission spectrum
- Dany of the two or three spectra above
8Which of the following is correct for (10^3)^4
- A10^7
- B10^12
- C10^-1
- D10^1
9What technique do we use to measure star's radial velocity?
- Aastrometry
- Bphotometry
- Cspectroscopy
- Dpolarization
10This figure shows thermal radiation spectra from three stars. Please rank temperatures of these three stars.
- AA>B>C
- BA=B=C
- CA<B<C
- DNone of the above
11The winter solstice was also on Dec 21 2020. What does winter solstice mean?
- AThe Sun is directly above theTropic of Cancer.
- BThe distance between the Earthand Sun is the longest.
- CThe Sun's coordinate is at declination of −23.5 degrees
- DThe day time is the longest inthe northern hemisphere.
12What are two important factors of professional telescopes?
- Afocal length and magnification
- Blight collecting area and resolution
- Cportability and weight
- Dquality of camera and data reduction package
13How does the collecting area of a 8-meter telescope compare with that of a 1-meter telescope?
- A8 times larger
- B64 times larger
- C512 times larger
- Dsame
14Which of the following size of telescope can reach a higher resolution or smaller diffraction limit?
- A1.0 meter
- B1.5 meter
- C4 meter
- D10 meter
15Which of the following wave bands can be observed from the ground?
- Agamma ray and X ray bands
- BX ray and radio bands
- Coptical and near infrared bands
- Dultraviolet and optical bands
16What should we observe to measure the Doppler shift of a star?
- Aphotometry
- Bspectroscopy
- Cpolarization
- Dfringes of interferometry
17Why is gravitational contraction failed to address the solar energy source?
- AIt takes to long to releaseenergy from gravitationalcontraction.
- BThe predicted total energy output will be released in just a few million years.
- CThe gravitational contraction causes the Sun to be spherical shape.
- DThe gravitational contraction could cause the solar planets in non-circular orbits.
18What is the main energy source of the solar energy?
- Aenergy released by proton-proton chain
- Benergy from alpha particles
- Cenergy solely from neutrinos
- Denergy from gamma rays
19How does the Sun transport energy from its core to surface?
- Aconvection and radiation
- Bconvection and conduction
- Cconduction and radiation
- Dconduction, radiation and convection
20Where can find the sunspots on the Sun?
- Acorona
- Bphotosphere
- Cchromosphere
- Dradiation zone
21Which layer can we see during the total solar eclipse?
- Aphotosphere
- Bcorona
- Cconvection zone
- Dradiation zone
22Which of the following order is correct for different solar layers from inside to outside?
- Acorona, chromosphere, photosphere
- Bcore, convection and radiation
- Cphotosphere, chromosphere, corona
- Dconvection, chromosphere, photosphere
23The 11 year solar cycle is very regular. When is estimated to be the next solar maximum?
- A2021
- B2025
- C2030
- D2040
24Which of the following space mission does not study the Sun?
- ANASA/SDO
- BNASA/SOHO
- CNASA/Ulysses
- DNASA/Parker Solar Probes
- ENASA/Juno
25Absolute zero degree is
- A32 degrees Fahrenheit
- B0 degrees Fahrenheit
- C0 degrees Kelvin
- D0 degrees Celsius
26We know the Earth rotates around the Sun with a period of 365 days, or 30 km/s. How fast does the Sun rotate around the center ofour Milky Way galaxy?
- A30 km/s
- B125 km/s
- C220 km/s
- D1250 km/s
27Which of the following technique is used to measure apparent magnitude of a star?
- Aphotometry
- Bastrometry
- Cspectroscopy
- Dbinarity
28Which of the following statement is correct?
- AA 10th magnitude star is brighter than 5th magnitude star.
- BTo obtain the luminosity of a star, we would only need apparent magnitude.
- CThe color of a star can be obtained astrometrically.
- DA stellar spectrum can be used to determine radial velocity of a star.
29How can we observe a deep sky object?
- AUse a telescope with a larger size of mirror.
- BObtain a CCD with a higher sensitivity or lower noise.
- CIncrease exposure time.
- Dall the above.
30We know two star have the same G2 spectral types. Which of the following statement is correct?
- AThey are located on the exact same location on the H-R diagram.
- BThey have the same temperature.
- CThey have the same distances tothe Earth.
- DThey have the same apparent magnitudes.
31You made three spectroscopic observations for three stars. Their spectra are shown in the figure. Please sort their temperatures.
- AA>C>B
- BA>B>C
- CB=C=A
- DB>C>A
32Two stars have the same absolute magnitudes and colors. What does this mean?
- AThey are located at the exact samelocation on the H-R diagram.
- BWe do not know their distances.
- CThey have the same masses.
- Dall the above.
33Star A has the apparent magnitude of 12 at V band. It has a parallax of 0.02 arcsec. What is its absolute magnitude and V band?
- A7.0
- B8.5
- C10.2
- D11.5
34To measure the distance to a star accurately, we need to know which of the following?
- AThe temperature of this star
- BThe spectral type of this star
- CThe pixel size of the camera
- DThe luminosity of this star
35Which of the following statement is true?
- AStars at a given luminosity on the H-R diagram have the same temperature.
- BAt a given temperature, subdwarfs are brighter than dwarfs.
- CTwo components of a binary system always share the same location of the H-R diagram.
- Dnone of the above
36Which of the following statement is true?
- AA binary system can be appeared to be visual, eclipsing and spectroscopic binaries.
- BTo measure radial velocities of a binary, we would need to measure its V band magnitude.
- CAny binary can be appeared to a spectroscopic binary.
- DThe spectroscopic method is used to detect eclipsing binaries.
37This a picture from "Astronomy of Picture of the Day". Where could this picture be taken based on the constellations seen in thepicture?
- ACanada
- BCosta Rica
- CBrazil
- DAntartica
38Th e Morgan-Keenan spectral classification system have luminosity classes of I, II to VI. Which of the following luminosity classes is the faintest?
- AI
- BIII
- CIV
- DV
39We obtain two spectra of two stars. After analysis, one star has a spectral type of F2V and the other is K9V. Which of the following is correct?
- AThe effective temperature of F2V is higher than K9V.
- BThe F2V star has a higher mass than a K9V star.
- CThe K9V star has a smaller radius than a F9V star.
- DAll the above.
Información
- Descripción
- Astronomy Test sobre Final Exam Study Questions, creado por Libby Nugent el 27/04/2021.
- Autor
- Libby Nugent
- Idioma
- English
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