Create a custom practice set
Pick category, difficulty, number of questions, and time limit. Start instantly with your own quiz.
Generate QuizGK Question
Which electromagnetic wave has the longest wavelength?
- Gamma rays
- X-rays
- Visible light
- Radio waves
Answer: Radio waves
EM spectrum order (longest to shortest wavelength): Radio > Microwave > IR > Visible > UV > X-ray > Gamma. Radio waves used in communication; gamma rays in cancer treatment. [[NCERT Physics Class 12]]