youshouldknow
world and global knowledge that you should know
Jumat, 15 September 2017
What Is Ultraviolet Light?
Ultraviolet light is a type of electromagnetic radiation. These high-frequency waves can damage living tissue.
from Live Science http://ift.tt/2vjmxgj
via
IFTTT
Tidak ada komentar:
Posting Komentar
‹
›
Beranda
Lihat versi web
Tidak ada komentar:
Posting Komentar