The document summarizes 4 activities conducted by a student group to investigate properties of light. In Activity 1, they constructed a spectroscope to observe the spectra of different light sources. In Activity 2, they observed diffraction patterns using a slit. Activity 3 explored light interference. For Activity 4, they studied iridescence. The group hypothesized how to create a rainbow effect and developed a product idea for a "bright bottle". They thank those who supported their work in the Al-Bairaq competition.