[quote author=lookang link=topic=1040.msg3870#msg3870 date=1237719681]
by the way, Puzzled you are my ex-student rite? LOL
hope you find the forum useful in your uni studies.
there are many applets you can learn from by doing. Enjoy :)

Lol you've guessed right, Mr Wee ><;

Thanks for the heads up, this forum here is a goldmine of information! The applets here are wonderful! :D

[quote author=Fu-Kwun Hwang link=topic=1040.msg3869#msg3869 date=1237715096]
When light travel from one media to another media, part of the light will reflected back to the original media.
Some of the light will enter another media and change it direction (due to change in velocity).
Yes, the wavelength of the light will change when enter different media.(only frequency will not change).
The wavelength of light in the water is different from wavelength in air.

You forgot that light must enter into our eye in oder to see it.
The path of the refracted light you saw, must be back to the air and enter you eye for you to see it.
So the wavelength is the same when light enter your eye again!

Wow, of course! Thanks very much!

I must apologise for dragging this question out, but just to clarify, would the refracted beam within the material with a higher refractive index than air (meaning that before it emerges back into air) still be red (theoretically), if say a red laser was used?

EDIT: But I also understand from what you said that the wavelengths of visible light are different in different mediums, so i guess that means that the laser would still retain its colour...