Students will love this escape room. In this activity, students will review the electromagnetic spectrum; properties of light, and properties of mirrors and lenses. This Google Form activity contains 20 questions. There are five puzzles, and each includes four questions. Students must open five locks. As questions are answered, a four-letter code is generated that will open the locks. Each puzzle contains response validation. Students can't move to the next puzzle until they enter the correct code. An answer key is included.