How can You make a rainbow Without a Prism?

You will use:

Pan with water

Mirror 

Do this: 

Place a mirror at an angle inside

the water filled pan.

Place the pan in the path

of a strong source of the light

The rays should strike the mirror 

it  was refracted or bent  because  

the  rays  passed through more 

than one substance.

The bending light rays 

separated into their many
parts each one traveling

at a different frequency 

the result was the rainbow

colors on the wall.