Cho <span class="MathJax_Preview" style="color: inherit; display: none;"></span><span id="MathJax-Element-1-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="<math xmlns="http://www.w3.org/1998/Math/MathML"><mstyle mathsize="1.2em"><mi>h</mi><mo>=</mo><mn>6</mn><mo>,</mo><msup><mn>625.10</mn><mrow class="MJX-TeXAtom-ORD"><mo>&#x2212;</mo><mn>34</mn></mrow></msup><mi>J</mi><mo>.</mo><mi>s</mi><mo>;</mo><mspace width="thinmathspace" /><mspace width="thinmathspace" /><mi>c</mi><mo>=</mo><msup><mn>3.10</mn><mn>8</mn></msup><mi>m</mi><mrow class="MJX-TeXAtom-ORD"><mo>/</mo></mrow><mi>s</mi></mstyle></math>" role="presentation" style="font-size: 127%; position: relative;"><span id="MJXc-Node-1" class="mjx-math" aria-hidden="true"><span id="MJXc-Node-2" class="mjx-mrow"><span id="MJXc-Node-3" class="mjx-mstyle"><span id="MJXc-Node-4" class="mjx-mrow" style="font-size: 120%;"><span id="MJXc-Node-5" class="mjx-mi"><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.495em; padding-bottom: 0.298em;">h</span></span><span id="MJXc-Node-6" class="mjx-mo MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.101em; padding-bottom: 0.298em;">=</span></span><span id="MJXc-Node-7" class="mjx-mn MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.396em; padding-bottom: 0.347em;">6</span></span><span id="MJXc-Node-8" class="mjx-mo"><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.145em; padding-bottom: 0.544em;">,</span></span><span id="MJXc-Node-9" class="mjx-msubsup MJXc-space1"><span class="mjx-base"><span id="MJXc-Node-10" class="mjx-mn"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.396em; padding-bottom: 0.347em;">625.10</span></span></span><span class="mjx-sup" style="font-size: 70.7%; vertical-align: 0.591em; padding-left: 0px; padding-right: 0.071em;"><span id="MJXc-Node-11" class="mjx-texatom" style=""><span id="MJXc-Node-12" class="mjx-mrow"><span id="MJXc-Node-13" class="mjx-mo"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.298em; padding-bottom: 0.445em;">−</span></span><span id="MJXc-Node-14" class="mjx-mn"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.396em; padding-bottom: 0.347em;">34</span></span></span></span></span></span><span id="MJXc-Node-15" class="mjx-mi"><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.445em; padding-bottom: 0.298em; padding-right: 0.078em;">J</span></span><span id="MJXc-Node-16" class="mjx-mo"><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.145em; padding-bottom: 0.347em;">.</span></span><span id="MJXc-Node-17" class="mjx-mi MJXc-space1"><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.199em; padding-bottom: 0.298em;">s</span></span><span id="MJXc-Node-18" class="mjx-mo"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.15em; padding-bottom: 0.544em;">;</span></span><span id="MJXc-Node-19" class="mjx-mspace" style="font-size: 83.3%; width: 0.167em; height: 0px;"></span><span id="MJXc-Node-20" class="mjx-mspace" style="font-size: 83.3%; width: 0.167em; height: 0px;"></span><span id="MJXc-Node-21" class="mjx-mi MJXc-space1"><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.199em; padding-bottom: 0.298em;">c</span></span><span id="MJXc-Node-22" class="mjx-mo MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.101em; padding-bottom: 0.298em;">=</span></span><span id="MJXc-Node-23" class="mjx-msubsup MJXc-space3"><span class="mjx-base"><span id="MJXc-Node-24" class="mjx-mn"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.396em; padding-bottom: 0.347em;">3.10</span></span></span><span class="mjx-sup" style="font-size: 70.7%; vertical-align: 0.591em; padding-left: 0px; padding-right: 0.071em;"><span id="MJXc-Node-25" class="mjx-mn" style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.396em; padding-bottom: 0.347em;">8</span></span></span></span><span id="MJXc-Node-26" class="mjx-mi"><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.199em; padding-bottom: 0.298em;">m</span></span><span id="MJXc-Node-27" class="mjx-texatom"><span id="MJXc-Node-28" class="mjx-mrow"><span id="MJXc-Node-29" class="mjx-mo"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.445em; padding-bottom: 0.593em;">/</span></span></span></span><span id="MJXc-Node-30" class="mjx-mi"><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.199em; padding-bottom: 0.298em;">s</span></span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math xmlns="http://www.w3.org/1998/Math/MathML"><mstyle mathsize="1.2em"><mi>h</mi><mo>=</mo><mn>6</mn><mo>,</mo><msup><mn>625.10</mn><mrow class="MJX-TeXAtom-ORD"><mo>−</mo><mn>34</mn></mrow></msup><mi>J</mi><mo>.</mo><mi>s</mi><mo>;</mo><mspace width="thinmathspace"></mspace><mspace width="thinmathspace"></mspace><mi>c</mi><mo>=</mo><msup><mn>3.10</mn><mn>8</mn></msup><mi>m</mi><mrow class="MJX-TeXAtom-ORD"><mo>/</mo></mrow><mi>s</mi></mstyle></math></span></span><script type="math/tex" id="MathJax-Element-1">\large h = 6,625.10^{-34}J.s ;\,\, c = 3.10^8 m/s</script>. Mức năng lượn

Cho h=6,625.1034J.s;c=3.108m/s. Mức năng lượn

4.4/5

Tác giả: Thầy Tùng

Đăng ngày: 18 Aug 2022

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Câu hỏi:

Cho h=6,625.1034J.s;c=3.108m/s. Mức năng lượng của các quỹ đạo dừng của nguyên tử hiđrô được tính En13,6n2eV; n = 1, 2, 3 … Khi electron chuyển từ mức năng lượng ứng với n = 3 về n = 1 thì sẽ phát ra bức xạ có tần số:

Đáp án án đúng là: B

Lời giải chi tiết:

HD: 
f=E3E1h=(13,63213,612).1,6.10196,625.1034=2,9.1015Hz.