블로그
- Day59 【제목】 "Atoms and Electrons Basics - Easy Level" 【출처】 Khan Academy Physics & BBC Bitesize Science Everything
- Refraction and Snell's law | Geometric optics | Physics | Khan Academy 굴절 망원경 refracting telescope 굴절각 angle of refraction, refraction angle 굴절곁수 refraction coefficient 굴절계 refractometer 굴절 광선 refracted ray 굴절날 refracting edge 굴절도