なぜ⑴では空気の屈折率を文字で置いてるのに、⑷は屈折率1で考えてるのか教えてください。

|30| 光通信などに使用される光ファイバーでは、光の全反射現象などが利用されている。 その原 理を図のような円柱状媒質のモデルで考えよう。 円柱の中心軸からある半径までの部分は屈折 率(絶対屈折率nの媒質Iであり,その外側は屈折率nの媒質ⅡIである。円柱の端面は中心 軸と垂直であり、図は,円柱の中心軸を通る平面で切った断面図である。 この平面内で , 空気 中から円柱の端面の中心点Aに入射角で入ってくる光が, 屈折して円柱内に入り, その後ど のように伝わるかを調べる。 屈折率の間には、 常に nnn (no は空気の屈折率) という 関係があるものとして, 以下の設問に答えよ。 (1) 光が媒質I と媒質ⅡIの境界面で全反射をして, 媒質Iの中だけを伝わるためには,入射角 はどのような条件を満たせばよいか｡ sin0 についての不等式で示せ。 (2) 屈折率の大きさによっては,入射角をどのように選んでも光が媒質 ⅡIの中に入れないこ とがある。 そのようなことが起こらずに, 光が媒質ⅡIの中にも入ることができるためには, 屈折率の間にどのような関係があればよいか。 (3) 屈折率の間に設問 (2)で求めた関係がある場合, 光が媒質ⅡIの中には入るが円柱の外には出 ないためには,入射角0はどのような条件を満たせばよいか。 (4) 光が点Aに入射角で入射し, 媒質Iの中を全反射しながら光ファイバーの長さの方向 に距離だけ進む時間を求めよ。 ただし, 真空中での光速度をcとする。 空気 no 0 A no N2 "n₁" n2 空気 媒質 ⅡI -媒質Ⅰ 媒質 Ⅱ

至急❗️答えが合っているか見ていただきたいです🙇 よろしくお願いします

5) (6) (7 (8 (9 50 LESSON 13 Choose (bammolni Encame\\ probare veng hyppor\2262720109 bas Juode) zaronial 1 Choose the best answer to fill in the blanks. (1) (1) There was ( ) audience at the movie theater. Da large 3 many 2 large (4) As I had a bad cold, I was made ( 1 take (2) Always keep a bucket of water handy, ( 1 unless in case of (3) My teacher recommended several books to the class, ( 1 that A 2 which (5) Someone hit me on 1 a (7) I am sure ( 1 not his (8) The girl ( 1 who helle ) fire. 3 to prepare (10) To begin ( 1 at (12) 157 (nodw\ jol 3 one of that 2 to take to take the time. 861 (6) The picture is said (dule) just before he died. 3 be taken having been drawn check my smart2 to be drawn 3 to have been drawn 4 to have drawn (11) This restaurant is ( (1) more (千葉工業大) (四天王寺国際仏教大) 4 his t me on (r) head. an\ayab\board blood) best Foob slijpst 2 an 3 the ) coming to the party. 2 his not 共立女子 ibidezog\mobsent\mont Vi word ) the bitter medicine against my will. 4 taking (9) It is only 6 o'clock in the morning. She ( 1 may still asleep 3 may be sleeping 3 of his not 4 much bit of 4 ready on ) has become a one of which ), you must buy an admission ticket. 2 on with KURSE 4 of not his blan) at this time. 2 might have been sleeping 4 might still asleep ) sweet voice John loves is a good singer. aviah Lotus A 2 what 3 which whose bestseller. 4 from ) nicer than the one I visited last week. 2 too 3 as 4 far (関西学院大) AS (13) Some of the milk turned sour before it reached the market and ( 1 must throw 2 have to be thrown 3 had to throw had to be thrown (近畿大) THIOS (ALLE) (大阪経済大) ) that such a thing would happen to all of the guests staying at the hotel. Little did I dream 2 Little dream did I 3 Little I did dream 4 Little dream I did away. (神奈川大) (奈良) 2 (東邦) (清泉女子大 (1) (芝浦工業大) (2) (3 (²

２番です。1行目から2行目の変形は1番で求めたz1/z2が zと表せるので、z1/z2の絶対値に合わせ、 それだと分母がルートになるので、 それを有利化した形ということでしょうか？

基礎問 30 第2章 複素数平面 15 積と商 次の問いに答えよ. (1) 21=1+√3i, z2=1+ i とするとき, Z1Z2, れぞれ求めよ. 1+√3 i 1+i (2) z = Z1の絶対値と偏角をそ Z2 を計算し, sin 15° の値を求めよ.

１番の解説一行目、「絶対値zはルート2だから」とありますが、なぜですか？

KEIPI 14 共役な複素数 (1) z=1+iのとき, 2zを極形式で表せ. 2つの複素数 α, β について, (2) |a|=|B|=1のとき, |α+B|=|12/2+1/31 を示せ。

tourist visitor traveler の違いを教えてください。

和文英訳の問題です (2)Do you know how many rooms there are? (3) I have a lot of things to do before it. (4)I walked about an hour from here. と書き... 続きを読む

(2) A: Yesterday, I visited Mamoru's house. It was huge. VECTCAI-TOX B: I know. Ten! nsflo gnol (3) A: You are going to Okinawa next week. Are you excited? B : Yes, but [その前にすることがたくさんあるんだ｡] (4) A: Have you ever been to Tokyo Dome? B: Yes. que [いくつ部屋があるか知ってるかい。] [ここから歩いて1時間くらいかかったよ。 ]

34〜41の答えを教えてください。

A long email from Japan arrived in the computer of Bill Perkins, who worked in an office in London. The message was from a company in Tokyo that Bill's company had just sent a large order to. Bill read it once and then once (注1) named Steve to read. Steve read it and also looked again, looked puzzled, and then gave it to a colleague" confused. The letter began by praising the English company. () It then mentioned that some goods had been damaged during shipping (2) to Japan, and then the letter happily 34 (v) This kind of letter may work well in Japan, 35 it is not very successful as international communication. The letter 36 the reader to read between the lines to understand the problem and to sympathize with the company. (5) Of course, it also wanted Bill and Steve's company to rectify the trouble. But the letter did not spell out (4) that message very 37 . So Bill and Steve were thinking of just ignoring it. But then they received more correspondence from the Japanese company, this time with a specific request for action. It was an hour later when a second letter arrived that contained 38 for the first confusing letter. It also stated the intent of the Japanese company concerning the damaged goods. They wanted the replacement items shipped as soon (25) would foot as possible with no charges. Bill and Steve were happy once again because their insurance company the bill 16), and the goods would arrive in about ten days. (2) The Japanese company didn't follow the standard international business pattern in its communication. But the English company was 39 , too, because they hadn't realized that there was a deeper meaning to the letter. Bill and Steve had only looked at the communication's surface. It seems to me that both sides could benefit from a seminar on international understanding. (1) colleague: (2) shipping: (**) * (注3) rectify: 対応する (注4) spell out : 詳しく述べる (5) insurance company (注6) foot the bill: 費用を払う t (Terry O'Brien et al. Simply Reading, Simply Writing NAN'UN-DO) 6

(2)(5)(6)を教えてください🙇🏻‍♀️

2 〔過去完了] 次の日本文に合うように, ( 内の動詞を適する形にして全文を書け。 (1) 私が彼を訪問したときには, 彼はアメリカへ行ってしまっていた。 He (go) to America when I (call) on him. lon He had gone to America when I called on him. (2) 川がはんらんした。 一晩中雨が降ったからだ。 The river (flood), because it (rain) all night long. The river had floaded because it had rained all night Long. (3) 彼がホールに着いたとき, 音楽会はすでに始まっていた。 When he (get) to the hall, the concert (already begin). When he got to the hall, the concert had already begun. (4) 病気になって1週間経ってから、 彼は入院した。 After he (be) ill for a week, he (be sent) to hospital. After he had been ill for a week, he was sent to hospitol. (5) ここへ引っ越してくるまでは, 犬を飼っていた。 We (have) a dog before we (move) here. We had a dog before we moved here. (6) ある日、僕はテレビでボクシングの試合を見た。 あれほど興奮する試合を見たことがなかった。 One day I (enjoy) a boxing match on television. I (never see) such an exciting match before. One day I enjoyed a boxing match on television. I have never seen a such an exciting match before.

これは､符号は変わらないんですけど なぜですか、？ 変わるときはどういうときでしたっけ､ 教えてください🙇‍♀️🙏

152 2次方程式 - x2 +6x+4m +3=0 の判別式 をDとすると D=62-4･(−1)(4m+3)=16m +48 D>0のとき 16m +480 すなわち m>-3 D=0のとき 16m +480 すなわち m=-3 D<0のとき 16m+480 すなわち m<-3 よって, グラフとx軸の共有点の個数は USO" m>-3のとき 2個, ny We -3のとき 1個, m<-3のとき 0個 x20V+S. TASON OTVISIN

解答を教えてください！本当にお願いします

Lesson6 The Power of Words Scene3 5 When she was 24, she moved to Brazil with her husband. At first, her life there was hard because she couldn't speak Portuguese at all. However, she was andhe Ecatul lucky to become friends with a boy named Luisinho who became her Portuguese #RC Asta teacher. She enjoyed learning the language by listening to his speaking because than (likel speaking way staf it sounded like singing. Amazingly, the meaning of words came across more through his voice when he spoke to her. 6 One day, Luisinho invited her to`dance, but she was too shy to do so. said, "Eiko, you have a heart, and it beats tokutoku tokutoku, right? Human beings are made that way!" listen to that, you can dance. these words, she was stunned. 付状況…しながら father told stories using onomatopoeia. Until meeting Luisinho, she had He If you When she hear Hearing She recalled feeling that tokutoky when her (she s started/ focused only on the meaning of language, but he helped her to see the mystery and Langugo 分かる. _depth of it. She realized that even when we don't know much vocabulary if language has the right rhythm and sounds, it amazingly reaches the listener. FLU あまり~ない