What exactly is the difference between frequency and period?


by LoveKnowledge
Tags: difference, frequency, period
LoveKnowledge
LoveKnowledge is offline
#1
Oct23-10, 05:22 PM
P: 52
I am on the "sound" chapter in my Conceptual Physics class but I just wanted to know the best way to explain in layterm: what is the difference between frequency and period?
Phys.Org News Partner Physics news on Phys.org
Physicists design quantum switches which can be activated by single photons
'Dressed' laser aimed at clouds may be key to inducing rain, lightning
Higher-order nonlinear optical processes observed using the SACLA X-ray free-electron laser
russ_watters
russ_watters is offline
#2
Oct23-10, 07:35 PM
Mentor
P: 22,000
They are inverses of each other.
pallidin
pallidin is offline
#3
Oct23-10, 07:57 PM
P: 2,292
To elaborate:

Frequency is the number of occurrences of a repeating event per unit time. It is also referred to as temporal frequency. The period is the duration of one cycle in a repeating event, so the period is the reciprocal of the frequency. Loosely speaking, 1 year is the period of the Earth's orbit around the Sun,[1] and the Earth's rotation on its axis has a frequency of 1 rotation per day.[2]

Source: http://en.wikipedia.org/wiki/Frequency

Studiot
Studiot is offline
#4
Oct24-10, 03:10 AM
P: 5,462

What exactly is the difference between frequency and period?


I suggest you make a habit of paying special attention to the units of new physical quantities you meet.
Very often looking at these helps understand what the quantity is measuring.
You may have to look beyond the modern trend to replace descriptive units with the names of dead scientists.

So

Frequency is measured in Hertz ( a dead scientist) but originally in cycles per second and is the number of repeats of the wave or oscillation per second.

Period is the measured in seconds and is the number of seconds it takes said oscillation to repeat.
arildno
arildno is offline
#5
Oct24-10, 03:34 AM
Sci Advisor
HW Helper
PF Gold
P: 12,016
Frequency is measured in Hertz ( a dead scientist)

That's so gross..

Couldn't you just leave his remains alone, rather than "measuring" things in him???
jtbell
jtbell is offline
#6
Oct24-10, 09:03 AM
Mentor
jtbell's Avatar
P: 11,232
Think of frequency as "cycles per second" and the period as "seconds per cycle". Or substitute any other time unit that's more convenient for the purpose at hand.


Register to reply

Related Discussions
URGENT//Period and frequency question Introductory Physics Homework 4
frequency and period Introductory Physics Homework 5
Frequency, Period and Waves Introductory Physics Homework 9
Period, the Pendulum and Frequency Introductory Physics Homework 5