ํžˆ์–ด๋กœ๋ž‘ ๊ทธ๋ƒฅ์ด๋ž‘ ์ฐจ์ด๊ฐ€ ๋จธ์ž„?
๊ทธ๋ƒฅ์ด light speed ์ด๊ฑฐ์ธ๊ฑฐ๊ฐ™์€๋””
๊ทธ๋ƒฅ์ด ๋” ๋น„์‹ผ๊ฒƒ๊ฐ™์€๋ฐ ํžˆ์–ด๋กœ๊ฐ€ ๋” ์‹ ํ˜•์•„๋‹˜?