2.  You will have one Glass prism, screen and ray-
box
 Try to set your apparatus as you like
Questions
 what will you observe after your setting?
 If you are scientist, what hypothesis will you
suggest?

3.  When white light pass the prism, the light will
refract and disperse into seven colours.
 White light is a mixture of coloured lights.
 They are red, orange, yellow, green, indigo, blue
and violet.
 This is called colour spectrum.

4.  How to make rainbow by yourself?
http://hk.youtube.com/watch?v=fIbxHqPyF2U

5.  Why does the man stand against the sunlight when
he is making the rainbow?
 Answer: Only when the sun light from our backside
can produce totally internal reflection, and received
by ours eyes.

6.  Misconception
Rainbow is produced just by one droplet

7.  http://hk.youtube.com/watch?v=LoL1Mn5
v6GY