Why is a rainbow the LGBT symbol?

Related questions

1. What does the rainbow represent in the Bible?
2. What does a rainbow symbolize in the Bible?
3. Which color has the longest wavelength?
4. Why rainbow is the color of LGBT?
5. What does the rainbow symbolize?
6. What causes a rainbow?
7. Is there a pansexual flag?
8. What does LGBT Q stand for?
9. Who was the first LGBT person?
10. Why is the LGBT symbol rainbow?

Tags

1. #diversity
2. #worldwide
3. #originated
4. #reflect
5. #rainbow
6. #northern
7. #california
8. #pride
9. #francisco
10. #community
11. #colors
12. #while
13. #during
14. #symbol
15. #often
16. #rights
17. #marches