Hướng dẫn giải Bài 2 (Trang 166 SGK Vật lý 11)

2. Chiết suất tỉ đối <span id="MathJax-Element-1-Frame" class="mjx-chtml MathJax_CHTML" style="box-sizing: border-box; margin: 0px; padding: 1px 0px; overflow-wrap: normal; word-break: break-word; display: inline-block; line-height: 0; text-indent: 0px; text-align: left; text-transform: none; font-style: normal; font-weight: 400; font-size: 18.08px; letter-spacing: normal; word-spacing: 0px; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; color: #131313; font-family: Quicksand; font-variant-ligatures: normal; font-variant-caps: normal; orphans: 2; widows: 2; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; position: relative;" tabindex="0" role="presentation" data-mathml="<math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>n</mi><mrow class="MJX-TeXAtom-ORD"><mn>21</mn></mrow></msub></math>"><math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>n</mi><mn>21</mn></msub></math> của môi trường (2) đối với môi trường (1) là gì? Giải Chiết suất tỉ đối <math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>n</mi><mn>21</mn></msub></math><span id="MathJax-Element-1-Frame" class="mjx-chtml MathJax_CHTML" style="box-sizing: border-box; margin: 0px; padding: 1px 0px; overflow-wrap: normal; word-break: break-word; display: inline-block; line-height: 0; text-indent: 0px; text-align: left; text-transform: none; font-style: normal; font-weight: 400; font-size: 18.08px; letter-spacing: normal; word-spacing: 0px; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; color: #131313; font-family: Quicksand; font-variant-ligatures: normal; font-variant-caps: normal; orphans: 2; widows: 2; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; position: relative;" tabindex="0" role="presentation" data-mathml="<math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>n</mi><mrow class="MJX-TeXAtom-ORD"><mn>21</mn></mrow></msub></math>"> của môi trường (2) đối với môi trường (1) là tỉ số giữa sin góc tới (<math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>sin</mi><mi>i</mi></msub></math>) và sin góc khúc xạ (<math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>sin</mi><mi>r</mi></msub></math>).                                                                       <math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>n</mi><mn>21</mn></msub><mo>=</mo><mfrac><msub><mi>sin</mi><mi>i</mi></msub><msub><mi>sin</mi><mi>r</mi></msub></mfrac></math>