1. Preparation - Chapter 1.1a, Chapter 1.1b

2. Participation - Assignment P.8 Q7-10 and P.41 Q26, 30

3. Presentation - Blackboard, Student's Work

4. Possession
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1. Preparation - Chapter 1.2a, b, b2 , c, c2(Threshold frequency), c3(no time delay), c4(I-V relationship), c5 (example 1), c6 (Intensity of light), c7 (Failure of wave theory)

2. Participation - Assignment P.18 Q6, 8 and P.41 Q22, 27

3. Presentation - Blackboard, Student's Work

4. Possession
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1. Preparation - Chapter 1.3a, Chapter 1.3b, Chapter 1.3c

2. Participation -
   
   Assignment 3A
   P.33 Q10-14 and P.41 Q23, 24, 28, 29, 25
   
   Assignment 3B
   P.41 Q31-39
   

3. Presentation - Blackboard, Student's Work

4. Possession
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What wave theory assumes? And why it cannot explain photoelectric effect?

• According to wave theory, wave is a continuous form of energy, its energy is determined by its amplitude only (but not frequency).

• According to wave theory, an electron can ALWAYS absorb enough energy to escape from a metal surface if ENOUGH time is given. However, it is not the case. The incident wave must have a HIGH ENOUGH FREQUENCY and it takes NO TIME to have an electron to emit.

• According to photon theory, light is wave packet.
  An electron may absorb a photon in no time. If the energy of photon (E = hf) is high enough, the photon is absorbed and the electron is emitted. However, an electron can only absorb one photon only.

• LASTLY, the maximum KE of photoelectron is limited in photoelectric effect experiment as Kmax = hf-W (W is work function of the metal surface). In wave theory, however, Kmax should increase with intensity (or amplitude) of the wave, and of course, wave theory is wrong.