Một kim loại có giới hạn quang điện là λ0 = 0,3 μm        . Năng lượng photon tối thiểu để bứt electron ra khỏi kim loại trên là:         

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  Have you found anywhere suitable ___________ our picnic?
   

• Choose the best answer for the following sentence:

  I ____________ when I heard my name _____________
  
  

• Choose the best answer for the following sentence:

  The movie ___________ last night was terrific.
  
  

• Find a mistake in the four underlined parts of the sentence and correct it:

  Don’t try that kind of food. I’m sure you will like it.

• Choose the best answer for the following sentence:

  When there __________ a full moon, the ocean tides will be higher.
  
  

• Find a mistake in the four underlined parts of the sentence and correct it:

  The World Cup is regarded as the world champion of the sport.

• Choose one sentence that has the same meaning as the root one:

  He could not afford to go abroad for further study.
  
  

• Choose one sentence that has the same meaning as the root one:

  Most of the people in the village prefer the city life.
  
  

• Choose one sentence that has the same meaning as the root one:

  Will the last person to leave switch off the lights.
  
  

• Choose one sentence that has the same meaning as the root one:

  No bicycle against glass please!