MODULE 4 (PHYSICS 10)

Uses of Mirrors and Lenses in Optical Instruments

An e-module based on DepEd CARAGA LEAST LEARNED COMPETENCIES with Internet-Based Laboratory Activities.

Arranged by: Elaikah Keith G. Dato-on – MAED Physics

Welcome to the Future of Learning Physics! Explore, Experiment, and Discover the Wonders of the Physical World

TO THE FACILITATOR

Welcome to this e-module with an Internet-Based Laboratory Activities in Physics 10, an interactive and comprehensive learning resource designed to enhance your understanding of the fundamental concepts in physics. As a facilitator, you are expected to orient the learners on how to use this e-module. You also need to keep track of the learners’ progress while allowing them to manage their own learning at home. Furthermore, you are expected to encourage and assist the learners as they do the tasks included in the e-module.

TO THE LEARNER

Welcome to the exciting world of digital learning! As a learner, you must learn to become responsible of your own learning. We hope that this e-module will serve as a valuable tool in your learning journey, providing you with the knowledge and skills you need to excel in your studies. We encourage you to take full advantage of this resource, explore all its features, and actively participate in the interactive activities.

E-MODULE
POLICIES

  • Rule 1: Active Participation: Engage actively with all the materials and activities. The more you interact, the more you learn.
  • Rule 2: Pace Yourself: Don’t rush through the content. Take your time to understand each concept before moving on to the next.
  • Rule 3: Note-Taking: Keep a notebook handy for jotting down important points or questions that arise during your learning.
  • Rule 4: Utilize Resources: Make full use of additional resources provided in this module. It is there to enhance your understanding.
  • Rule 5: Reflect: After completing each section, take a moment to reflect on what you’ve learned and how you can apply it.

How to Use E-Modules?

01. OVERVIEW

This provides you with the general information
about the e-module.

02. PRE-TEST

This determines your background knowledge of the lesson.

03.MOTIVATIONAL ACTIVITY

This is an activity before proceeding to the lesson proper.

04. LESSON PROPER AND RESOURCES

This is the part where you can find the basic concepts about the lessons discussed

05. ILAB

These are the internet-based laboratory activities to be performed by you which will enrich your understanding of the lessons or concepts.

06. POST TEST

This is the part that intends to determine how much you have learned from the lesson.

– OVERVIEW –

Understanding Mirrors and Lenses in Optical Instruments

Learning Competency: Identify ways in which the properties of mirrors and lenses determine their use in optical instruments (e.g., cameras and binoculars). (S10FE-llj-54)

– PRE-TEST –

Before we delve into our upcoming lesson, it’s crucial to establish a foundational understanding of the topic at hand. This not only primes your mind for new information but also allows you to connect new knowledge with what you already know. To facilitate this, we have prepared a set of questions designed to gauge your existing knowledge on the subject matter. These questions are not a test, but a tool to help you—and us—understand your current familiarity with the topic.

We encourage you to answer these questions thoughtfully and honestly. There’s no need to rush—take your time to reflect on each question. Remember, the goal here is not to get all the answers right, but to provide an accurate snapshot of your current understanding. So, let’s embark on this journey of discovery together. Your responses will guide us in tailoring the upcoming lessons to your learning needs, ensuring a more effective and enjoyable learning experience. Ready? Let’s begin!

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Module 4 - Pre Test

Directions: Read and understand each question carefully and encircle the letter of the best answer.

1 / 10

Which optical instrument uses a concave mirror to focus light?

2 / 10

What is the primary role of a concave mirror in telescopes?

3 / 10

Why are concave lenses used in eyeglasses for nearsightedness?

4 / 10

What type of optical instrument would use a convex mirror?

5 / 10

Which type of lens is used in a magnifying glass?

6 / 10

Which type of mirror is used in rearview mirrors of vehicles?

7 / 10

Which type of lens is commonly used in magnifying glasses?

8 / 10

What is the primary function of lenses in optical instruments?

9 / 10

Which type of mirror is used in rear-view mirrors of vehicles?

10 / 10

In which optical instrument are both concave mirrors and convex lenses used?

Your score is

The average score is 20%

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0%

– MOTIVATIONAL ACTIVITY –

Matching Game

Directions: Match the optical instrument or function in Column A with the correct mirror/lens type in Column B.

– LESSON PROPER AND RESOURCES –

Info Box

To begin exploring the module lessons, click on the first image displayed. Once selected, scroll to the left to navigate through the rest of the content using the scrolling view. Each image represents a different lesson, so continue scrolling to discover all the topics included in this module.

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– iLAB (Internet-Based Laboratory Activity) –

Identifying the Types of Mirrors and Lenses Used in Optical Instruments

Please see the following objectives of this activity:

Identify the types of mirrors and lenses used in optical instruments (e.g., cameras, magnifying glasses).
Understand the role of mirrors and lenses in focusing light, magnifying objects, and forming images in various optical devices.

Please complete the following materials for this activity:

Computer or tablet with internet access.
Access to the following Interactive Simulations:
CK-12 Magnifying Glass Simulation: CK-12 Magnifying Glass (Simulation Link 1)
Cassegrain Telescope Simulation: CK-12 Cassegrain Telescope Simulation (Simulation Link 2)

Simulation Link 1 (Press to open)

Simulation Link 2 (Press to open)

Please read the following activity instructions:

Access the CK-12 Magnifying Glass Simulation
Set Up the Magnifying Glass Experiment:
Adjust the object’s position in relation to the convex lens in the magnifying glass.
Beyond the focal point (F): Move the object beyond the focal point.
At the focal point (F): Position the object at the focal point.
Between the focal point (F) and the lens: Place the object between the focal point and the lens.
Observe the image characteristics (real/virtual, upright/inverted, magnified/diminished).
Record Your Observations:
Object Beyond the focal point (F): What happens to the image when the object is beyond the focal point?
Object at the focal point (F): How does the image change when the object is at the focal point?
Object Between F and the lens: What is the result when the object is between the focal point and the lens?
Access the Cassegrain Telescope Simulation:
Click on the Cassegrain Telescope Simulation link to explore how light is gathered and focused using mirrors in telescopes.
The simulation shows the Cassegrain telescope, which uses both concave and convex mirrors to focus light for clearer, more detailed images of distant objects
Set Up the Telescope Experiment:
Adjust the object (star) position in the simulation to observe how the image changes when the telescope is focused.
Explore how the concave primary mirror and the convex secondary mirror work together to focus the image and form a sharp, clear image of distant stars.
Record Your Observations:
What happens to the image as you adjust the focus of the Cassegrain telescope?
How do the concave and convex mirrors work together to gather light and focus it?

– POST-TEST –

As we conclude our lesson, it’s important to assess your understanding of the topic we’ve just explored. This step not only helps reinforce your new knowledge but also enables you to connect the concepts you’ve learned with your existing understanding. To assist in this, we’ve prepared a set of questions designed to gauge how well you’ve grasped the key points of the lesson. These questions are not a test, but a valuable tool to help both you—and us—assess your progress.

Take your time to reflect on each question and answer thoughtfully. There’s no rush—the goal here is not to get every answer right, but to give an honest and accurate snapshot of your current understanding.
This process will guide us in refining future lessons to better meet your learning needs, ensuring a more effective and enjoyable experience moving forward.

So, let’s continue on this journey of discovery! Ready? Let’s begin!

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0

Module 4 - Post Test

Directions: Read and understand each question carefully and encircle the letter of the best answer. 

1 / 10

What is the primary function of a convex mirror in a vehicle?

2 / 10

What kind of mirror is typically used in optical instruments to reflect light for focusing purposes?

3 / 10

Which optical instrument uses a convex lens for magnification?

4 / 10

Which type of lens is used in corrective eyeglasses for farsightedness?

5 / 10

Which type of mirror is used in optical instruments to magnify objects?

6 / 10

What is the primary role of a convex lens in a camera?

7 / 10

What type of mirror is used in makeup mirrors to magnify the face?

8 / 10

What effect does a concave lens have on light rays?

9 / 10

What is the purpose of a convex mirror in security systems?

10 / 10

Which optical instrument uses a convex lens to focus light?

Your score is

The average score is 0%

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0%

Compare your answers with the pre-test to see how much you’ve learned and retained.

– REFERENCES –

Website Articles:

BYJU’S. (n.d.). Concave and convex mirrors: Difference between mirror and lens. Retrieved March 27, 2025,
from https://byjus.com/physics/concave-convexmirrors//physics/difference-between-mirror-and-lens

Interactive Simulations and Educational Resources::

CK-12 Foundation. (n.d.). Magnifying glass simulation. Retrieved March 27, 2025, from
https://interactives.ck12.org/simulations/physics/magnifying-glass/app/index.html
CK-12 Foundation. (n.d.). Cassegrain telescope simulation. Retrieved March 27, 2025, from
https://interactives.ck12.org/simulations/physics/cassegrain-telescope/app/index.html?lang=en&referrer=ck12Launcher&backUrl=https://interactives.ck12.org/simulations/physics.html
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