[{"data":1,"prerenderedAt":183},["ShallowReactive",2],{"topic-page:\u002Fhigh-school\u002Fbasic-physics\u002Fwave\u002Fwave-quantities-and-graphs":3},{"topic":4,"category":146,"seo":150,"breadcrumbs":155,"prerequisites":162,"nextTopics":174,"relatedTopics":182},{"id":5,"slug":6,"title":7,"summary":8,"canonicalPath":9,"categoryPath":10,"difficulty":11,"targetAudience":12,"estimatedMinutes":13,"generatedAt":14,"publishedAt":14,"updatedAt":14,"reviewStatus":15,"tags":16,"expectedKnowledge":22,"learningGoal":25,"blocks":26},"high-school-basic-physics-wave-wave-quantities-and-graphs","wave-quantities-and-graphs","波を表す量と二つの波形","振幅、波長、周期、振動数、位相を、位置を横軸にした波形と時刻を横軸にした波形から正しく読み分けます。","\u002Fhigh-school\u002Fbasic-physics\u002Fwave\u002Fwave-quantities-and-graphs","\u002Fhigh-school\u002Fbasic-physics\u002Fwave","beginner","student_high",6,"2026-07-28","ai_generated",[17,18,19,20,21],"物理基礎","波","波長","周期","振動数",[23,24],"速さの単位","グラフの横軸と縦軸","空間波形と時間波形を区別し、振幅・波長・周期・振動数を読み、波の速さを計算できるようになる。",[27,32,43,72,87,93,102,108,114,127,136],{"id":28,"type":29,"title":7,"subtitle":30,"shortDefinition":31},"hero","HeroBlock","横軸を見れば、λかTかが決まる","同じ波でも、ある時刻の全体像を撮れば横軸は位置x、一点の揺れを記録すれば横軸は時刻tです。横軸を最初に確かめると、波長と周期を取り違えません。",{"id":33,"type":34,"term":35,"definition":36,"plainExplanation":37,"keywords":38},"definition","DefinitionBlock","波の基本量","振幅Aは基準位置からの最大変位、波長λは同じ振動状態が空間で繰り返す距離、周期Tは一回振動するのにかかる時間、振動数fは1秒当たりの振動回数です。","空間波形では、山から次の山まで、または同じ向きで基準線を横切る点から次の同じ点までが一波長です。時間波形で同じ状態が再び現れるまでが一周期です。位置xを固定して時間変化を見ると周期、時刻tを固定して空間の形を見ると波長を読みます。",[39,40,41,42],"振幅A","波長λ","周期T","振動数f",{"id":44,"type":45,"title":46,"formulas":47,"strategy":71},"formula","FormulaBlock","周期・振動数・波の速さ",[48,59],{"label":49,"expression":50,"meaning":51,"symbols":52},"周期と振動数","T=1\u002Ff","f回の振動が1秒に入るなら、1回にかかる時間はその逆数です。",[53,56],{"symbol":54,"meaning":55},"T","周期。単位はs",{"symbol":57,"meaning":58},"f","振動数。単位はHz",{"label":60,"expression":61,"meaning":62,"symbols":63,"tip":70},"波の基本式","v=fλ","一周期Tの間に波形が一波長λだけ進む関係です。",[64,67],{"symbol":65,"meaning":66},"v","波の速さ。単位はm\u002Fs",{"symbol":68,"meaning":69},"λ","波長。単位はm","Hzは1\u002Fsなので、Hz×mはm\u002Fsになります。","グラフの横軸→読める量→必要な式→単位、の順で確認します。",{"id":73,"type":74,"columns":75,"rows":79,"summary":86},"compare","CompareBlock",[76,77,78],"グラフ","固定するもの・横軸","横の繰返し",[80,83],[81,82,40],"空間波形","時刻tを固定・位置x（m）",[84,85,41],"時間波形","位置xを固定・時刻t（s）","見た目が同じ曲線でも横軸の物理量が違えば、山から山までが表す量も変わります。",{"id":88,"type":89,"src":90,"alt":91,"caption":92},"diagram","DiagramBlock","\u002Fassets\u002Fhigh-school\u002Fbasic-physics\u002Fwave\u002Fwave-quantities-and-graphs\u002Fwave-quantities-and-graphs.svg","位置を横軸にして波長と振幅を読む空間波形と、時刻を横軸にして周期を読む時間波形の比較図","上段は同じ時刻に各位置を見た空間波形で横の一周期が波長λ、下段は同じ位置を時間追跡した波形で横の一周期が周期Tです。縦の最大幅はどちらも振幅Aです。",{"id":94,"type":95,"steps":96,"title":101},"steps","StepBlock",[97,98,99,100],"横軸が位置xか時刻tかを読む","基準線から山までを振幅Aとして読む","同位相の二点間をλまたはTとして読む","T=1\u002Ffまたはv=fλへ単位をそろえて代入する","波形問題の判断手順",{"id":103,"type":104,"scenario":105,"explanation":106,"result":107},"example","ExampleBlock","振動数5.0 Hz、波長0.80 mの波について、周期と速さを求める。","周期はT=1\u002Ff=1\u002F5.0=0.20 sです。速さはv=fλ=5.0×0.80=4.0 m\u002Fsです。振動数は一秒当たりの回数、波長は一回分が空間に占める距離なので、二つを掛けると一秒に進む距離になります。","周期は0.20 s、波の速さは4.0 m\u002Fsです。",{"id":109,"type":110,"warningTitle":111,"message":112,"severity":109,"action":113},"warning","WarningBlock","山から山までが常に波長とは限らない","横軸が時刻なら、山から次の山までが表すのは周期Tです。曲線の形だけで量を決めないでください。","計算前に横軸の名前と単位へ丸を付け、mならλ、sならTと書き添えます。",{"id":115,"type":116,"title":117,"questions":118},"quiz","QuizBlock","確認テスト",[119],{"question":120,"choices":121,"answerIndex":122,"choiceExplanations":123},"ある位置で媒質の変位を時間に対して記録したグラフで、隣り合う山の時刻差が0.25 sでした。この値は何ですか。",[41,40,39],0,[124,125,126],"正解です。横軸が時刻なので、同じ状態が繰り返す時刻差は周期です。","波長は同じ時刻の空間波形で、位置の差として読みます。","振幅は基準位置から山または谷までの縦の最大変位です。",{"id":128,"type":129,"title":130,"points":131},"summary","SummaryBlock","まとめ",[132,133,134,135],"横軸が位置なら波長λ、時刻なら周期Tを読む","振幅Aは基準位置からの最大変位","周期と振動数はT=1\u002Ff","波の速さはv=fλで単位はm\u002Fs",{"id":137,"type":138,"title":139,"nextTopics":140,"relatedKeywords":142},"next-action","NextActionBlock","媒質の動きから波の種類を見分ける",[141],"high-school-basic-physics-wave-transverse-and-longitudinal-waves",[143,144,145],"横波","縦波","進行方向",{"path":10,"title":18,"description":147,"parentPath":148,"accentToken":149},"物理基礎の中でも、波の伝わり方や音の性質を扱うトピックを整理していくカテゴリです。","\u002Fhigh-school\u002Fbasic-physics","signal-blue",{"title":151,"description":152,"canonicalUrl":153,"ogImage":154},"波長・周期・振動数と波形 | 物理基礎","波の振幅、波長、周期、振動数、位相とv=fλを、位置波形と時間波形の違いから学びます。","https:\u002F\u002Fzeqnilo.com\u002Fhigh-school\u002Fbasic-physics\u002Fwave\u002Fwave-quantities-and-graphs","https:\u002F\u002Fzeqnilo.com\u002Fassets\u002Fsite\u002Fdefault-og.svg",[156,159,160,161],{"title":157,"path":158},"高校","\u002Fhigh-school",{"title":17,"path":148},{"title":18,"path":10},{"title":7,"path":9},[163],{"id":164,"title":165,"summary":166,"canonicalPath":167,"categoryPath":168,"categoryTitle":169,"difficulty":11,"targetAudience":12,"estimatedMinutes":13,"publishedAt":170,"updatedAt":14,"reviewStatus":15,"tags":171},"high-school-basic-physics-mechanics-speed-and-velocity","速さと速度","速さと速度の違いを、向きの有無に注目して整理し、力学でどちらを使うのかを分かりやすくします。","\u002Fhigh-school\u002Fbasic-physics\u002Fmechanics\u002Fspeed-and-velocity","\u002Fhigh-school\u002Fbasic-physics\u002Fmechanics","力学","2026-05-17",[17,169,172,173],"速さ","速度",[175],{"id":141,"title":176,"summary":177,"canonicalPath":178,"categoryPath":10,"categoryTitle":18,"difficulty":11,"targetAudience":12,"estimatedMinutes":179,"publishedAt":14,"updatedAt":14,"reviewStatus":15,"tags":180},"横波と縦波","波の進行方向と媒質粒子の振動方向を比べ、山・谷または密・疎の見え方と結び付けて横波と縦波を見分けます。","\u002Fhigh-school\u002Fbasic-physics\u002Fwave\u002Ftransverse-and-longitudinal-waves",5,[17,18,143,144,181],"疎密波",[],1785565319718]