How do you make a rainbow in the classroom?

Answer 1

shine a ray from a ray box into a glass prism onto a black background

Answer 2

You can make a rainbow in the classroom with a prism or a glass of water by shining light through it. When light passes through, it refracts and separates into different colors creating a rainbow effect on a surface. Another way is to use colored paper or fabric to create a rainbow display on a wall.