Question

List the following methods for determining distance in order of their ability to measure increasing distances. For each method, also list an object whose distance would be measured using that method.

a) Fitting
b) Hubble Law
c) Parallax
d) Radar
e) Tully-Fisher Relationship

Answer 1

The methods for determining distance in order of their ability to measure increasing distances are: Parallax, Tully-Fisher Relationship, Hubble Law, Fitting, and Radar.All options are correct.

Step-by-step explanation:

1. Parallax - Parallax is the method of determining distance by measuring the change in position of an object when observed from different points. An object whose distance can be measured using parallax is a nearby star.
2. Tully-Fisher Relationship - The Tully-Fisher Relationship connects the line broadening of 21-cm radiation to the luminosity of spiral galaxies. This method is used to measure the distance to spiral galaxies.
3. Hubble Law - Hubble's Law states that the velocity at which a galaxy is moving away from us is directly proportional to its distance. This method is used to measure the distances to remote galaxies.
4. Fitting - Fitting refers to the process of fitting a mathematical model to observational data. It can be used to estimate distances to objects by comparing their observed properties to models or known relationships.
5. Radar - Radar is a method of determining distance by measuring the time it takes for radar signals to travel to an object and back. This method is used to measure the distances within the solar system. An object whose distance can be measured using radar is a planet or other body within the solar system.