Trong thí nghiệm Y-âng về giao thoa ánh sáng, nguồn S phát ra ánh sáng đơn sắc. Nếu dịch màn quan sát một đoạn 0,2 m theo phương vuông góc với mặt phẳng hai khe thì khoảng vân thay đổi một lượng bằng 500 lần bước sóng. Khoảng cách giữa hai khe là:                 

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  Auld Lang Syne is a popular song which is often sung _____________ New Year’s Eve in Britain.
   

• Choose the best answer for the following sentence:

  - ________________ attended the performance by the Beatles on August 15, 1965?
  - About 60,000 fans.
   

• Choose the best answer for the following sentence:

  - ____________ to the concert?
  - Only once or twice a year.
  
  

• Choose the word that has the underlined part pronounced differently from the rest:

  music                         electric                             consist                          center

• Choose the word that has the underlined part pronounced differently from the rest:

  heart                           appear                           hear                           beard

• Choose the best answer for the following sentence:

  The pop singer chose a ____________ flight because the show would be on the next day.
   

• Choose the best answer for the following sentence:

  ______________ contrast to classical music, pop music consists of short songs with strong beat and simple tunes.
   

• Choose the best answer for the following sentence:

  Can you play any ___________ instrument?
   

• Choose the best answer for the following sentence:

  - ___________ did the pianist quit his career?
  - Due to a serious injury on his finger.
  
  

• Choose the best answer for the following sentence:

  - ________________ from here to Hawaii?

  - I do not know exactly, but it takes three hours if you go by plane.