University of San Carlos-Basic Education Department
The Sisters of Mary School- Girls Town. Poblacion, Talisay
City
PHYSICS
Far-Seeing
Angular Magnification and Telescope
Quarter:Post secondaryNo. of Sessions :1 Session; August 1,
2013
CONTENT STANDARD: The objective lens of a telescope produces a
real, inverted and diminished first image and the eyepiece
magnifies this first image to form a greatly enlarged and virtual
final image near infinity.
PERFORMANCE STANDARD: Students will be able to solve the angular
magnification and length of the telescope and will be able to
describe the relationship between the M, fo, & fe.
TPO:Students will be able to apply the concept of a telescope,
angular size, angular magnification and thin-lens equation to solve
problems.
OVERVIEW:
The lesson will allow students to reminisce and ponder upon the
discovery of telescope and how it actually helps in furthering the
scientific advancements. Students will be introduced to the
concepts of angular magnification and size. Each student is
expected to solve problems regarding the topic. This plan covers
the topics on telescope, angular magnification, angular size and
thin-lens equation.
ObjectivesAssessment
Session 1
1. Appreciate the advantages brought about by the telescope2.
Identify important parts of a telescope and their functions3.
Analyze telescopes ray-tracing illustration4. Review and reapply
basic optical system parameters and lenses combination to describe
the images formed5. Define angular magnification and angular size6.
Calculate angular magnification and length of telescope using the
formulas M= -fo/fe and L= fo + fe respectively7. Measure student
learning development and progress
Quick feedback and questioning techniques are often done to
facilitate discussion and teacher-student communication.Board work
on problem-solving will be done to stimulate active student
participation.Summative test (the topic of telescope will be
included together with similar topics) will be administered to
gauge student learning.
Lesson Proper
SESSION 1Telescope and Angular MagnificationEXPLORE1. Ask
students with open-ended questions regarding the difference between
generations with telescope and without. 2. Provide for a short
history of telescope. FIRM-UP
3. Ask students of their idea about the advantages of a
telescope and its discovery and make their answers as a foundation
to define telescope
4. Discuss the important parts of a telescope and their
corresponding functions5. Ask the students to hold a penny or
similar objects close to their eye but not beyond the near point
and compare its size to a bigger object thats being held by the
teacher. Allow the students to note the difference of sizes as
perceived by their eyes. Then, ask them, why do our eyes perceive
closer objects bigger than farther objects of similar or even
larger actual size? 6. Introduce the concept of angular size and
angular magnification.
7. Solve A Penny and the Moon problem to elaborate the
newly-presented concepts. DEEPEN8. Using a ray-tracing diagram,
determine the angular magnification of a telescope. 9. Present a
problem on the angular magnification and solve it with the
class.
TRANSFER
10. Allow students to solve 1 or 2 more problems on their own
with teachers assistance and scaffold. Ask volunteers to show their
solutions on the board. The teacher must correct spotted
alternative conceptions and general mistakes shown.
CLOSURE11. Make a wrap-up activity by allowing some student
volunteers to complete any of the following sentences: a. What I
learned today is __________________________.
b. 20 years from now, Id still remember that
___________________________.
c. I thought that ________________________ but now I learned
that __________________________.
d. I hope to learn more about
______________________________________.
Proposed Plantilla 2013-2014\MLVJ\
