Lesson Plan | Technical Methodology | Lenses: Types

Objectives

Duration: (10 - 15 minutes)

This stage of the lesson plan aims to ensure that students understand the fundamental concepts of the types of lenses and their characteristics. By developing practical and experimental skills, students will be better able to apply this knowledge in real situations, facilitating the connection with the job market and promoting meaningful learning.

Main Objectives

1. Identify the two main types of lenses: converging and diverging.

2. Describe the properties and characteristics of converging and diverging lenses.

3. Recognize the practical application of these lenses in different job market contexts.

Side Objectives

1. Develop practical skills through the manipulation of lenses.
2. Stimulate critical thinking and problem-solving abilities based on practical experiments.

Introduction

Duration: (15 - 20 minutes)

The purpose of this stage is to contextualize the importance of lenses in daily life and in the job market, sparking students' interest and preparing them for the subsequent practical activities. Through curiosities and concrete examples, students will begin to see the relevance of the topic and will be more motivated to learn about the properties and types of lenses.

Contextualization

The physics of lenses is an essential part of the study of optics, which has practical applications in various areas of everyday life and science. From vision correction with glasses and contact lenses to use in technological devices such as cameras, microscopes, and telescopes, lenses play a fundamental role in our ability to observe and interact with the world around us. Understanding the different types of lenses and their properties is crucial for the development of technologies that improve quality of life and drive scientific advancements.

Curiosities and Market Connection

• Converging lenses (or convex) are used to correct hyperopia and in devices such as magnifying glasses and microscopes, enlarging images of nearby objects. * Diverging lenses (or concave) are used to correct myopia and in equipment such as binoculars, adjusting the direction of light rays to provide a clear view of distant objects. * In the job market, professionals such as optometrists, optical engineers, and optical device designers use knowledge about lenses to develop and enhance products that meet health and technology needs.

Initial Activity

Initial Activity: Provocative question: "How do the lenses of your glasses work to correct your vision?" Short video: Present a 3-5 minute video that shows practical applications of lenses in different devices, such as cameras, binoculars, and microscopes. It can be a YouTube video showing simple experiments with lenses or a visual explanation of how they work.

Development

Duration: (40 - 45 minutes)

This stage aims to deepen students' knowledge of the types of lenses through practical activities and reflections. By building prototypes and conducting experiments, students develop practical and analytical skills, fostering a more robust understanding of the properties of lenses and their applications in the job market.

Covered Topics

1. Definition of converging (convex) and diverging (concave) lenses.
2. Characteristics and properties of converging lenses.
3. Characteristics and properties of diverging lenses.
4. Practical applications of lenses in the job market.

Reflections on the Theme

Guide students to reflect on how different types of lenses are essential in their daily lives, from vision correction to image magnification in optical devices. Encourage them to consider how understanding the properties of lenses can influence the development of new technologies and innovative solutions in the job market.

Mini Challenge

Building an Optics Prototype

In this practical activity, students will build a simple prototype using converging and diverging lenses to observe their properties and effects.

Instructions

1. Divide the students into groups of 3-4 people.
2. Distribute a material kit to each group containing: two converging lenses, two diverging lenses, a flashlight, a ruler, graph paper, and lens supports.
3. Ask the groups to arrange the lenses in different configurations and use the flashlight to project beams of light through the lenses, observing how the light rays are refracted.
4. Instruct the students to record their observations on graph paper, noting the focal distances and the directions of the light beams.
5. Request that each group presents their findings, explaining the differences observed between converging and diverging lenses.

Objective: Understand in practice how converging and diverging lenses affect the trajectory of light beams, observing their properties and characteristics.

Duration: (30 - 35 minutes)

Evaluation Exercises

1. Explain the difference between a converging lens and a diverging lens.
2. Describe a practical application for each type of lens and how their properties are used in that context.
3. Draw a diagram showing how light behaves when passing through a converging lens.
4. Draw a diagram showing how light behaves when passing through a diverging lens.

Conclusion

Duration: (10 - 15 minutes)

The purpose of this stage is to consolidate students' learning, ensuring that they clearly and cohesively understand the concepts covered. By promoting a reflective discussion, students can connect theory to practice and visualize the applications of lenses in real contexts, increasing the relevance and retention of the knowledge acquired.

Discussion

Promote an open discussion with students about what they learned during the lesson. Question them about the differences between converging and diverging lenses and how these lenses are applied in different devices in the job market. Encourage students to reflect on the challenges they faced while completing the mini challenge and how they solved those problems. Ask how they can apply the knowledge gained in everyday situations and in their future careers.

Summary

Recap the main points covered in the lesson: the definition and characteristics of converging and diverging lenses, their properties, and the practical applications of these lenses in areas such as medicine (glasses and contact lenses), photography (camera lenses), and science (microscopes and telescopes).

Closing

Conclude the lesson by explaining how the combination of theory and practice during the activity helped solidify students' understanding of lenses. Emphasize the importance of knowledge about lenses for the development of technologies that improve quality of life. Reinforce that understanding these properties is crucial for various careers and technological solutions.