In this echo lesson plan, students create echos using rubbers balls and a chair to simulate animals finding out where they are. Students follow 3 sets of directions and answer 2 questions.

Home page for a hypertext physics course on auditorium acoustics and acoustical design.

A physics tutorial on designing an auditorium and solving the problem of sound reflection. Illustrated.

This hypertext physics course tutorial on nonfocusing surfaces relates various design principles to good auditorium design. Illustrated.

A tutorial from a hypertext physics course book that discusses reverberation. Illustrated.

Ultraviolet (UV) light has shorter wavelengths than visible light. Though these waves are invisible to the human eye, some insects can see them. The specific wavelength values are given. Uses and applications of these waves are explained.