Recent content by thamwenyin

There are three prisoners A,B and C,one of them will be randomly picked by the king to be freed,two others will be executed. The king wants the guard to keep secret on who will be freed. A,who wants to know whether he himself will be freed asks the guard,who,between B and C will be executed. The...

I conducted a experiment to determine the order of oxidizing ability of the halogens in aqueous solution. Halogens were reacted with potassium halide solution. Why hexane was added in this experiment to indicate the changes of colour and to determine whether displacement of halogen occur? :confused:

Can you explain more detail about how actually credit card applies diffraction of light? Thanks.

I wonder is there any application for diffraction and diffraction grating in daily life except for lab purposes?:bugeye:

Thanks for all your replies! I learned a lot!

When i conduct the experiment,by using different angles of incident varying from >0 to 90<,the gap still appears. Based on what you said,total internal reflection in the mirror cause the gap to manifest, but total internal reflection will happen only at certain angle, how the gap can be seen all...

I put the ray box and the mirror on top of a sheet of smooth white paper and observe the light ray from a plan view. I tried removing the paper and observe it on the table,the same thing happened.

It means that the gap is caused by few times of reflection and refraction? I am still blur about how reflection and refraction of a light in the mirror stacks and come out with a gap.

The experiment that I conducted is similar to this>>http://www.youtube.com/watch?v=LMmnuUOZ6ho&feature=related From the video,it is obvious that there's a gap between the plane mirror and starting of reflected ray. Why does this happen? Is it caused by the glass and the coating of reflective...

I wonder why is there a gap at the starting of the reflected light when i conduct this experiment? Can anybody explain this to me? Thanks!