問題詳情
8.Some sunglasses are coated on one side with a thin film of MgF2 to reduce reflection from the glass surface.The index of refraction of MgF2 is 1.38; that of the glass is 1.50. What is the least coating thickness thateliminates (via interference) the reflections in the range of the visible spectrum (≒ 
550nm)? Assume thatthe light is approximately perpendicular to the glass surface.
(A)40nm
(B)60nm
(C)80nm
(D)100nm
(E)120nm
參考答案
無參考答案
內容推薦
- These backpackers forgot to make hotel reservations in advance, so they ________ having nowhere
- The customer service manager asked all the staff to be________in responding to complaints.(A) hes
- Peter is ________about his achievements; he credits the success to his research team.(A) skeptica
- Kids usually ________Christmas and New Year. That's when they have a lot of fun eating and
- When doing an experiment, we should always ________ that safety is of the utmost importance.(A)
- I am sorry, but you can't order beef noodles. We have beef. (A) run agains
- Parents have the responsibility to teach their children to draw a clear ________ between right an
- Reading novels is great mental exercise because it stimulates your ________ as well as improves y
- The police are ________ a tall, middle-aged man who was seen outside the bank just before the ro
- The fireworks display was so ________ that the visitors could hardly take their eyes off it.(A) f
內容推薦
- To cut costs, Veronica suggested ________ her apartment for shooting the scene.(A) that we could
- If the world's rain forests continue to disappear at their present rate, many species______
- The restaurant in Taipei ________ I had my first Taiwanese meal was a small and cozy place with
- If ________ they about your difficulty, they ________ a different decision. Yet, it is all too l
- The woman is new in our neighborhood. Do you know ________? (A) where does she live (B) where s
- A new study published in Journal of the International Neuropsychological Society concludes that it&#
- A: I don't feel like cooking today. B: ________ ordering a pizza instead?(A) What if(B) Why
- 【題組】The experts in this article indicate that a sense of humor is important because(A) laughter
- 【題組】Judging from the context, what does the word boost mean?(A) Worsen.(B) Upset.(C) Awaken.(D)
- 【題組】What can influence the effectiveness of the research mentioned in this article?(A) The numbe
- 【題組】What doesn't happen to the brain when it gets old?(A) The ability to do abstract reason
- Ned is determined to go to college ________ he has very little support from his family.(A) as if
- A new iPhone will be awarded to ________comes up with the best name for the new fragrance.(A) wh
- ________ working as a doctor, he also writes novels in his spare time.(A) Aside from (B) Except f
- Jim is afraid of making mistakes. ________this fear that prevents him from making progress.(A) W
- Betty's grandma is in her eighties now and ________ to be a little forgetful from time to t
- They've torn down the old buildings ________ reconstruct the whole neighborhood.(A) in orde
- We have made every effort to help the earthquake victims.________we can do now is pray and stay
- 請選出翻譯正確的句子:昨晚被那部電影嚇到之後，我沒辦法睡著。 (A) After I was scared by the movie last night, I couldn't fa
- 請選出翻譯正確的句子:如果我現在有一百萬，我要去環遊世界。 (A) If I have a million dollars, I will travel around the world. (
- 請選出翻譯正確的句子:Edward非常的不小心以至於犯了不少錯。 (A) Edward was too careless to make quite a few mistakes.(B) Suc
- 請選出翻譯正確的句子:雖然下著大雨，我父親堅持步行去上班。 (A) My father insisted on walking to his office despite the heavy r
- We can't go to Julia's party ________ we're going away this weekend.(A) as(B) due
- 請選出翻譯正確的句子:一聽到那則笑話，我們就哄堂大笑。 (A) On hearing the joke, we burst out laughing. (B) As soon as we hea
- 汽車即指行駛公路或市區道路上，不依軌道或電力架線而以原動機行駛之車輛。(A)O(B)X(C)(D)