'''스넬의 법칙 Snell's law, 굴절 법칙 law of refraction'''

$\frac{\sin\theta_1}{\sin\theta_2}=\frac{v_1}{v_2}=\frac{\lambda_1}{\lambda_2}=\frac{n_2}{n_1}$
여기서
 $\lambda$ : TBW
 $n$ : ....

$n_1\sin\theta_1=n_2\sin\theta_2$

$v_1=\frac{c}{n_1}$
$v_2=\frac{c}{n_2}$

{lambda_0가 뭐지? 모르면 삭제; from https://www.youtube.com/watch?v=iwRfS45pIVY&list=PL7EXGbyk8P69GIrXZcp3TfUDBWde_QQn-&index=63
$\lambda_1=\frac{\lambda_0}{n_1}$
$\lambda_2=\frac{\lambda_0}{n_2}$
}

굴절해도 진동수는 일정
 $f_1=f_2=f$

[[굴절,refraction]]
[[굴절률,refractive_index]]

[[페르마_원리,Fermat_principle]]
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AKA '''굴절 법칙'''

[[https://terms.naver.com/entry.naver?docId=3536937&cid=60217&categoryId=60217 물리학백과: 굴절 법칙 Law of refraction]]