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NEET UG Dual Nature of Radiation and Matter — practice questions — page 3

Explore 161 free Dual Nature of Radiation and Matter questions in NEET UG Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Dual Nature of Radiation and Matter questions and exercises with answers

Showing questions 61–90 of 161.

The minimum energy needed for an electron to escape a metal is the:Read the answer and worked solution →The work function is usually measured in:Read the answer and worked solution →One electron volt is the energy gained by an electron accelerated through:Read the answer and worked solution →Which metal has the highest work function?Read the answer and worked solution →Who performed the pioneering oil-drop experiment?Read the answer and worked solution →In interaction with matter, radiation behaves as if made of:Read the answer and worked solution →The energy of a photon is given by:Read the answer and worked solution →The momentum of a photon is given by:Read the answer and worked solution →A photon travels at a speed equal to that of:Read the answer and worked solution →Increasing the intensity of light of a given wavelength increases the:Read the answer and worked solution →Photon energy is independent of the radiation's:Read the answer and worked solution →In a photon-particle collision, what may not be conserved?Read the answer and worked solution →Who proposed the idea of matter waves in 1924?Read the answer and worked solution →De Broglie was a physicist of which nationality?Read the answer and worked solution →De Broglie was awarded the Nobel Prize in Physics in:Read the answer and worked solution →The wave nature of electrons was confirmed by Davisson and:Read the answer and worked solution →The de Broglie hypothesis of matter waves supports the stationary orbits of:Read the answer and worked solution →Place the discoveries in timeRead the answer and worked solution →Match each name to the workRead the answer and worked solution →True or false on dual natureRead the answer and worked solution →Conserved or not in a collisionRead the answer and worked solution →Fill the gaps on dual natureRead the answer and worked solution →Quick picks on dual natureRead the answer and worked solution →Spot the one that does not fitRead the answer and worked solution →Wave nature or particle natureRead the answer and worked solution →The work function of a metal depends on the metal's properties and itsRead the answer and worked solution →Electron emission produced by heating a metal is calledRead the answer and worked solution →Pulling electrons out of a metal with a very strong electric field, as in a spark plug, isRead the answer and worked solution →Field emission needs an electric field of roughly what order?Read the answer and worked solution →Who discovered photoelectric emission in 1887 during electromagnetic wave experiments?Read the answer and worked solution →

Worked practice questions

The minimum energy needed for an electron to escape a metal is the:

  1. Wave function
  2. Well function
  3. Watt function
  4. Work function
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Correct answer: D. Work function

1. Electrons are held in the metal by an attractive pull. 2. The minimum energy required to escape the surface is the work function. 3. So the correct answer is work function. _Source: syllabus Physics Part II, Ch 11 'Dual Nature of Radiation and Matter'_

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The work function is usually measured in:

  1. Electron volt
  2. Electron watt
  3. Electron ampere
  4. Electron ohm
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Correct answer: A. Electron volt

1. The unit is convenient for energies at the atomic scale. 2. The work function is measured in eV, the electron volt. 3. This unit is commonly used in atomic and nuclear physics. _Source: syllabus Physics Part II, Ch 11 'Dual Nature of Radiation and Matter'_

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One electron volt is the energy gained by an electron accelerated through:

  1. 9 volts
  2. 1 volt
  3. 2 volts
  4. 5 volts
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Correct answer: B. 1 volt

1. The unit is defined by an accelerating potential. 2. One electron volt is the energy gained by an electron accelerated through a potential difference of 1 volt. 3. So the correct answer is 1 volt. _Source: syllabus Physics Part II, Ch 11 'Dual Nature of Radiation and Matter'_

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