My lesson plan... he..he...
DAILY LESSON PLAN
SUBJECT
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PHYSICS
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CLASS
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F2T13a
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TIME
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9.00 - 10.00 a.m
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DATE
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25 March 2013
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NO. OF STUDENTS
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14
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LEARNING AREA
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QUANTIZATION OF LIGHT
- PHOTOELECTRIC EFFECT
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LEARNING OBJECTIVE
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EXPLAIN THE PHENOMENON OF PHOTOELECTRIC EFFECT
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LEARNING OUTCOME
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CONTENT KNOWLEDGE :
At the end of the class, the students should be able to
:
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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.
|
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SCIENTIFIC ATTITUDES AND NOBLE VALUES :
|
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SCIENTIFIC CONCEPTS
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The emission of photoelectron depends on :
Photocurrent depends on :
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MATERIALS, EQUIPMENT AND RESOURCE MATERIALS
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CONSIDERATION OF
SAFETY PRECAUTIONS
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None
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PRIOR KNOWLEDGE
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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).
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Phase
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Content
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Teaching and Learning Activities
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Notes
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Teacher
Activities
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Student
Activities
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|||
Introduction
(5 minutes)
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The currents flow due to potential difference.
The current cannot flow if the circuit is not connected
properly.
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Teacher shows a complete circuit and incomplete circuit
and ask the students opinions about both circuits.
Teacher also asks what make the current flow.
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Students will give their answer due to their previous
knowledge.
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Strategy/Technique: Whole class Q&A
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Structuring/ Restructuring of Ideas
(35 minutes)
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The emission of photoelectron depends on :
a. frequency of light.
b. type of metal (cathode) used.
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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
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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)
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Teacher
distributes the questions sheets to all students. Teacher asks them to
discuss the answers with their partner.
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Students solve
the questions. They can refer to their lecture notes or find the information
from internet.
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Strategy/Technique: Students are allowed to discuss
with each other.
Resources:
Question sheet.
Lecture notes.
Any suitable websites about photoelectric effect.
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Reflection/
Closure
(5 minutes)
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Teacher asks what factors that affect the emission of
photoelectron.
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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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