# Does the period or frequency represent an orbit?

#### marshall4

does the period or frequency represent an orbit?

Related Introductory Physics Homework Help News on Phys.org

#### HallsofIvy

Homework Helper
The question simply doesn't make sense. Any periodic function has both period and frequency- given one, you can calculate the other.
Neither "represents" an orbit.

If you do have something, such as a planet, orbiting, then you must have both a period (the number of days, seconds, etc. required to complete one full orbit) and a frequency (the number of orbits per day, second, etc.) and one is just the reciprocal of the other. If you are thinking of one as "representing" the orbit, the other could as well.

To answer the question you DIDN'T ask but probably intended, it is more common to give the period of an orbit of a planet about the sun rather than the frequency just because it is a simpler number in the most common units.

#### PrudensOptimus

1/T = Frequency

1/f = Period.

where T = period.

Knowing either one will get you the answer for the other.

### Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving