Ascilite Workshop 2007 (2 Dec 2007)

On 2 Dec 2007, Dr Quek, Timothy Cheng, Sok Ngin and myself conducted a workshop on concept mapping...

Here are some of the photos...

Sending off at the Airport

MLT 804 Class 2007

 
 

iN2015 (Video from IDA, Singapore)

Have you watched this?

The Intelligent Nation 2015? A vision for Singapore...

Visit to the Birdpark on 26 Oct 07

Learning Environment Session 1

General Properties of Waves

Just completed Thermal Physics with my pupils...

Starting with Waves Properties now...

Let's watch some video clips from youtube...



What are waves?
A wave is a disturbance that propagates through space or spacetime, transferring energy.

There are two types of waves and they are known as:

1) Transverse waves
For transverse waves the displacement of the medium is perpendicular to the direction of propagation of the wave. Examples include electromagnetic waves (radio wave, microwave, light, etc), water wave, etc.

Extracted from the BBC GSCE Website url: here


2) Longitudinal Waves
In a longitudinal wave the particle displacement is parallel to the direction of wave propagation. Sound is a form of longitudinal wave.

Extracted from the BBC GSCE Website url: here


Some properties of waves include:

1) Wavelength
The distance between two consecutive points on the wave that are in phase. E.g. Distance between two consecutive wave troughs or wave crests.
Its SI units is metre (m) and the symbol is a greek letter "lamda"


2) Frequency
Wave frequency, f , is known as the number of complete wave cycles in one second. It is measured in hertz (Hz).

Wave period, T , is the reciprocal of frequency. It is measured in seconds (s).

Period = 1/frequency


3) Wave Speed
Wave Speed, v = wavelength x frequency

Wave speed, v = wavelength / Period





Some other interesting websites on Waves:
Crocodile Clip