Chapter 28, Problem 5RAT

Light bends in a gravitational field. Why isn’t this bending taken into consideration by surveyors who use laser beams as straight lines?

1. (a) The bending of light occurs only in outer space.
2. (b) Red light doesn’t bend so much, which is why lasers are red.
3. (c) Laser light is an exception to this rule.
4. (d) Light travels so fast that the curvature is not noticeable for their surveying purposes.