Compared with an isolated Newtonian point-mass ellipse, what does the Schwarzschild correction do to a weak-field bound orbit?

• It makes the nearest point retreat each orbit
• It advances the nearest point each orbit
• It removes every change in the planet's direction

Two static clocks each remain at fixed r, θ and φ outside rₛ in a Schwarzschild vacuum region. Their radii differ. During the same interval of t, which accumulates less proper time?

• The clock at the smaller radius
• The clock at the larger radius
• Both clocks, regardless of their different radii

A spherical star with its surface outside rₛ must have a black-hole horizon in its Schwarzschild vacuum exterior.

For the same spherical mass in the weak-deflection regime, a light ray's impact parameter b doubles. What happens to its deflection angle?

• It becomes half as large
• It becomes twice as large
• It becomes four times as large

Static clocks are at r_low=2rₛ and r_high=8rₛ. For the same interval of t, what is Δτ_low/Δτ_high?

• √(7/4)
• 4/7
• √(4/7)

Which statement correctly describes the Schwarzschild black-hole horizon?

• It is a solid surface where every curvature measure diverges
• It is a causal boundary with removable coordinate failure
• It is only a label and has no effect on signal escape

A report assigns all measured planetary precession to the Schwarzschild correction. What must it also check?

• Newtonian perturbations
• Whether every orbit has exactly the same radius
• Whether changing coordinate names removes all precession

A probe falls across an ideal Schwarzschild horizon. Does smooth geometry there guarantee that the probe survives?

• Yes; smooth geometry removes all tidal forces
• No; the horizon is a solid wall that stops it
• No; finite tidal forces can still be large