Παραδείγματα από το σώμα κειμένου για RAYS
1. UVB rays, the most potent rays that reach the earth, cause sunburn.
2. Other chemicals absorb the UV rays and convert them into less–harmful infra–red rays.
3. The population of cownose rays has risen to as much as 40 million, and Peterson said scientists are worrying that the rays will target other species.
4. Integral, the Rossi Explorer and Swift all detect X–rays and gamma rays, which are far more energetic than the visible light that our eyes detect.
5. It subsequently cools by emitting what kind of radiation? a) Ultraviolet waves b) Gamma rays c) Infrared rays d) Radio waves 2.