中国科学技术大学
- The average density in the universe is too low that the universe is a weak gravity system。（ ）
- We don’t have gravitational redshift in Newtonian Gravity。（ ）
- In Schwarzschild geometry, the conservation of angular momentum implies that orbits lies in a plane。（ ）
- Observations of the small effects predicted by general relativity on the orbits of planets and trajectories of light rays in the solar system are important tests of the theory。（ ）
- The line element for a Riemann geometry must be positive definite。（ ）
- In general relativity, spacetime is Minkowski everywhere locally due to equivalence principle, and thus there is no local gravitational energy in GR。（ ）
- Hawking radiation generates from the vacuum fluctuations creating particle-antiparticle pair in the vicinity of black hole horizon。（ ）
- White dwarf is a type of strong gravity system。（ ）
- The equivalence of inertial mass and gravitational mass is one of the most accurately tested relations in physics。（ ）
- The Maxwell equations take the same form in every inertial frame of Newtonian mechanics。（ ）
- There is no closed orbit for massive particles in Schwarzschild geometry。（ ）
- For a spherical triangle, the smaller its area, the larger the sum of its interior angles。（ ）
- In Newtonian mechanics, instantaneous interaction is allowed。（ ）
- https://image.zhihuishu.com/zhs/question-import/formula/202209/bb854f98b07f4aa691f822ca0c489448.png
- https://image.zhihuishu.com/zhs/question-import/formula/202209/cca201a557c84d5fa9a166a681c18647.png
- The proper time for null geodesic is always zero。（ ）
- In a electromagnetic field, all bodies with the same initial conditions also follow the same curve in space and time。（ ）
- The Kerr family includes the Schwarzschild black hole in the special case of zero angular momentum。（ ）
- Hubble is an upper bound and a rough estimate of the age of universe。（ ）
- A standard candle is an type of objects whose luminosity can be inferred from a physical property that can be independently determined。（ ）
- Which of the following are the correct form of geodesic equation（ ）。
- Which of the following statements about the calculation of four-vectors are correct（ ）。
- Which of the following statements are correct about the metric
（ ）。 - Which of the following are correct abut Hubble-Lemaitre law?（ ）。
- https://image.zhihuishu.com/zhs/question-import/formula/202209/b1ad30ebb3ef498286f2c9fefa8e19e5.png
- Which of the following statements are correct about the particle motion described in polar coordinates（ ）。
- Which of the following are correct about the view of space-time in Newtonian mechanics（ ）。
- Which of the following statements are correct?（ ）。
- https://image.zhihuishu.com/zhs/question-import/formula/202209/1476a231038348beb9b230cd4505126f.png
- Which of the following statements are correct about the variational principle and geodesic equation in curved spacetime （ ）。
- Which of the following statements about gravitational waves are correct?（ ）。
- Which of the following statements are correct about the singularity of the 4D Schwarzschild metric
（ ）。 - Which of the following are possible polarization modes of linearized gravitational waves in general relativity（ ）。
- Which of the following statements are correct about light cones（ ）。
- Which of the following are Killing vectors of the Kerr metric
（ ）。 - What effects will the propagating gravitational waves cause（ ）。
- Which of the following interactions can Standard Model of particle physics describe（ ）。
- Which of the following statements are correct about linearized gravitational waves in general relativity（ ）。
- Which of the following are correct about the feature of Active Galactic Nuclei（ ）。
- https://image.zhihuishu.com/zhs/question-import/formula/202209/768e96119dd049e08594018434c25e28.png
- Which of the following statements are correct about the metric
（ ）。 - Which of the following is the correct form of flat FLRW metric（ ）。
- Which of the following transformation does not belong to Galilean transformation? （ ）
- When a plane GW of form
passes by in z direction, how does the distance between two point at the z=0 plane change（ ）。 - https://image.zhihuishu.com/zhs/question-import/formula/202209/faf7e3730551478b91c6d37dccdc7dd8.png
- Which of the following is correct about the evolution of the universe（ ）。
- In which of the following formula, the parameter m stands for gravitational mass（ ）。
- Which of the following is the correct expansion form of the time component of the energy-momentum tensor（ ）。
- Which of the following is the correct form of gravitational potential outside a spherical object of mass M in Newtonian Gravity（ ）。
- https://image.zhihuishu.com/zhs/question-import/formula/202209/8f4b4e8dcc1e491fad16ca4bf9834506.png
- Which of the following software may help you to get the Kerr solution analytically? （ ）
- https://image.zhihuishu.com/zhs/question-import/formula/202209/acf3d8c9329844de8e85c5a056e9320d.png
- Which of the following devices are NOT designed to detect CMB（ ）。
- Which of the following statements is correct about light ray orbits in Schwarzschild geometry? （ ）
- https://image.zhihuishu.com/zhs/question-import/formula/202209/959f955977f9442e9bb51d8a73c60671.png
- Which of the following is the correct form of the gravitational redshift formula（ ）。
- In short wavelength approximation and under condition
, what is the energy density in one polarization of a gravitational wave（ ）。 - https://image.zhihuishu.com/zhs/question-import/formula/202209/f97ccb9a600d496085f8a89c63de8a5f.png
- https://image.zhihuishu.com/zhs/question-import/formula/202209/616253bf48eb40979f37272cfeca2a9f.png
- https://image.zhihuishu.com/zhs/question-import/formula/202209/bae27af454a34344961d22bd79dff8eb.png
A:错 B:对
答案:错
A:错 B:对
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答案:A: 对
A:错 B:对
答案:对
A:对 B:错
答案:对
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答案:B: 错
A:对 B:错
答案:对
A:对 B:错
答案:B: 错
A:对 B:错
答案:对
A:错 B:对
A:错 B:对
A:对 B:错
A:对 B:错
A:错 B:对
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A:The embedding to 3d flat space is unique. B:This slice can be embedded into 3d flat space with
and 
.
C:This metric is asymptotically flat.
D:This metric describe a 2-dimension geometry.
A:Its form can be written as
.
B:It tells us that our universe is accelerated expanding.
C:We can roughly estimate of the age of universe throught Hubble constant.
D:We can estimate the distance of a distant star through its redshift.
A:This metric doesn’t describe gravitational interaction. B:It can describe the spacetime in Newtonian mechanics. C:It can describe the geometry of 4D spacetime for special relativity. D:This metric can also be written as
.
A:For physical trajectory, the value of
has an extremum.
B:The solutions to the geodesic equations are straight lines on the plane.
C:The Christoffel symbols for the metric of the plane are zero since the geometry is flat.
D:The equations for geodesics are given by 
and 
.
A:In Newtonian mechanics, the property of space and time depend on the choice of reference frame. B:In Newton’s era, time is absolute. C:In Newtonian mechanics, space and time are related to each other. D:A free particle moves on a straight line at a constant speed.
A:Einstein’s equivalence principle says that, there is no experiment that can distinguish a uniform acceleration from a uniform gravitational field. B:The equality of gravitational and inertial mass is one of the most accurately tested principles in all physics. C:The Eotvos experiment is a famous experiment of the test of equivalence principle. D:In the Eotvos experiment, the system can be balanced at rest shows the equivalence of gravitational and inertial mass.
A:The Schwarzschild solution is the only spherically symmetric vacuum solution in General Relativity B:This metric have one variable parameter M, indicating the mass of the black hole C:This metric is a black hole solution D:This metric is a solution of the Einstein field equation
A:In curved spacetime, the proper time is determined by a general metric
instead of the flat metric 
.
B:When the motion of bodies is a significant source of curvature, the statement of the variational principle may be different.
C:In curved spacetime, geodesic lines are the straightest lines and are straight lines.
D:The world line of a free test particle between two timelike separated points extremizes the proper time between them.
A:This concept was raised around one hundred years ago. B:We haven't detected gravitatinal wave signals so far. C:There are many equipments for gravitational wave detection, such as LIGO, Virgo and WMAP. D:It may be produced through binary star systems, supernova explosions and so on.
A:There is a physical singularity at
.
B:There is a physical singularity at 
.
C:There is a coordinate singularity at 
.
D:There is a coordinate singularity at 
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A:Two points on the light cone have positive spacetime separation. B:An observer can’t receive the message outside its light cone. C:The trajectory of a particle must be inside its light cone. D:Two points inside the same light cone can be separated by distances whose square is positive, negative or zero.
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A:The Newtonian gravitational constant will change. B:The coordinates will change. C:The physical distance will change. D:Energy will be carried from one place to another.
A:Weak interaction B:Electromagnetic interaction (QED) C:Strong interaction (QCD) D:Gravitational interaction
A:Gravitational waves are transverse waves. B:In GR, gravitational waves have two independent polarizations. C:Gravitational waves propagate with light speed. D:Gravitational waves don’t carry energy since gravitons are massless.
A:Their emission band is narrow, and centered at X-ray band. B:They typically have jets, which outflow optical or radio signal. C:They have extremely high luminosity. D:Their size of the emitting region is very large.
A:The Kerr metric has spherical symmetry. B:The Kerr metric has time invariance symmetry and axisymmetric symmetry. C:The symmetry of Kerr metric is lower than that of Schwarzschild metric. D:The Kerr metric has stationary symmetry and axisymmetric symmetry.
A:This metric can describe time-dependent weak gravitational field. B:It can be used to describe the gravitational field outside the earth. C:The gravitational field described by this metric is spatially homogeneous and isotropic. D:This metric describes the Minkowski spacetime.
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A:The universe is expanding, and the expansion of the universe is accelerating. B:The universe is expanding, and the expansion of the universe is decelerating. C:The expansion of the universe is always accelerating. D:The universe is shrinking, and the shrinking rate of the universe is accelerating.
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A:2. B:3. C:1. D:0.
A:Mathematica. B:Origin. C:Solidworks. D:Photoshop.
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A:LIGO. B:COBE. C:WMAP. D:Planck.
A:There is an instable circular orbit at r=3M. B:There is a stable circular orbit at r=3M. C:There is an instable circular orbit at r=6M. D:There is a stable circular orbit at r=6M.
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A:3. B:1. C:0. D:2.
A:1km. B:300km. C:3km. D:10km.
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