Some maintained that light and other frequencies of electromagnetic radiation are composed of particles, while others asserted that electromagnetic radiation is a wave phenomenon. (sciencedaily.com)
For other frequencies, only a small proportion is currently absorbed, so higher levels of greenhouse gases do make a difference. (newscientist.com)
I love collaborating with other teachers, sharing my ideas, and getting ideas from others Frequency about 1 post per month. (blog.feedspot.com)