Me.. Lesson Plan

Bermulanya lesson plan... setelah meninggalkannya selama 5 tahun... (last sekali buat 'proper' lesson plan ialah masa praktikal di STHAM, Melaka..

My lesson plan... he..he...



DAILY LESSON PLAN

SUBJECT
PHYSICS
CLASS
F2T13a
TIME
9.00 - 10.00 a.m
DATE
25 March 2013
NO. OF STUDENTS
14
LEARNING AREA
QUANTIZATION OF LIGHT
- PHOTOELECTRIC EFFECT
LEARNING OBJECTIVE
EXPLAIN THE PHENOMENON OF PHOTOELECTRIC EFFECT
LEARNING OUTCOME
CONTENT KNOWLEDGE :
At the end of the class, the students should be able to :
  • State the factors that affect the emission of photoelectron.
  • Explain the photoelectric effect in term of the dependence of :
    • kinetic energy of photoelectron on the frequency of light,
    • photoelectric current on intensity of incident light.
    • work function on the type of metal surface.
SCIENTIFIC SKILLS :
·          Students draw the photoelectric effect experiment setup.
·           Students observe the emission of photoelectron while changing variables ; frequency of light, intensity of light and type of metal
·          Students explain the motion of photoelectron due to increasing of frequency of light.
·           Students explain the number of photoelectron emitted due to type of metal surface and intensity of light.
·           Students draws the graph to describe the relation between photocurrent and potential difference.
SCIENTIFIC ATTITUDES AND NOBLE VALUES :
  • Students being respectful and well -mannered when listen teacher's explanation.
  • Students appreciating the contribution of science and technology.
  • Students being cooperative with their partner while studying the effect of frequency of light, intensity and type of metal to the photoelectron and completing their assignment in  worksheet  given.

SCIENTIFIC CONCEPTS
The emission of photoelectron depends on :
  • Frequency of light
  • Type of metal
Photocurrent depends on :
  • Intensity of light.
MATERIALS, EQUIPMENT AND RESOURCE  MATERIALS
  • Computer
  • Internet Access
  • Notes
  • Periodic Table
CONSIDERATION OF SAFETY PRECAUTIONS
None
PRIOR KNOWLEDGE
Students had learned about electrons flow due to potential difference. Students know that the electron is negatively charge and attracted to positive plate. They also know that the electron will repel back if it is near to negative plate. In previous chapter (Chapter 3: Electric Current and Direct Current Circuits), students had defined current as rate of change of charge. Therefore, current only exists if there is the flow of charge(electrons).



Phase
Content
Teaching and Learning Activities
Notes
Teacher Activities
Student Activities
Introduction
(5 minutes)
The currents flow due to potential difference.
The current cannot flow if the circuit is not connected properly.
Teacher shows a complete circuit and incomplete circuit and ask the students opinions about both circuits.
Teacher also asks what make the current flow.

Students will give their answer due to their previous knowledge.





Strategy/Technique: Whole class Q&A

Structuring/ Restructuring of Ideas
(35 minutes)
The emission of photoelectron depends on :
a. frequency of light.
b. type of metal (cathode) used.
Teacher gives worksheet Photoelectric Effect Experiment and order them to work in pair.
In the worksheet teacher asks the students draws the photoelectric effect experimental set-up.

Then, teacher tells them to write about photoelectric effect by their own words.

Teacher shows JAVA simulation from website: http://phet.colorado.edu/en/simulation/photoelectric.

Teacher tells the students to do their own exploration and write the details on their worksheet. 20 minutes will be given to them to explore and get the details (in form of explanation and graph)


After they finish their work, teacher will asks the question :
How frequency of light can affect the emission of electron?
Why type of metal affect the number of photoelectron emission?
After the photoelectron emit from the metal surface, where do they go?
What can the students say about the existence of current?



Students draw by referring to their lecture notes or search from internet


Students discuss among them. They can search from internet or refer to their lecture notes.
Students run the simulation.



Students observed the factors that affect the emission of photoelectron.
Students observed the change in the circuit if the photoelectron is able to reach the anode (collector).



Students answer the questions due to what they had observe by using the photoelectric effect simulation.

Strategy/Technique:
An inquiry activity in groups.
Resources: Worksheet sheet.
Noble values: Participate actively, appreciate the value of time
Application of Ideas
(15 minutes)
The electron from the surface of metal (cathode) will be liberated and emitted if :
a. the photon energy is big enough to break the electron bonding.
b. the type of metal used (cathode) is not hard.
c. the kinetic energy of photoelectron is enough to let the photoelectron reach the anode (collector)
 Teacher distributes the questions sheets to all students. Teacher asks them to discuss the answers with their partner.
 Students solve the questions. They can refer to their lecture notes or find the information from internet.
Strategy/Technique: Students are allowed to discuss with each other.

Resources:
Question sheet.
Lecture notes.
Any suitable websites about photoelectric effect.

Reflection/
Closure
(5 minutes)

Teacher asks what factors that affect the emission of photoelectron.
Students states the factors affecting the emission of photoelectron :

a)    Frequency of light
b)    Type of metal
c)    Intensity of light
Strategy/Technique:
Whole class Q&A


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