Rencana Pelajaran | Pembelajaran Sosioemosional | Lenses: Vergence

Tujuan

Durasi: 10 - 15 minutes

This stage aims to introduce the key concepts of vergence and focal length, preparing students both cognitively and emotionally for understanding and applying these ideas. By aligning learning objectives with socio-emotional skills, students will be better equipped to grasp the topic practically, aiding in real-world applications while also nurturing self-awareness and responsible decision-making.

Tujuan Utama

1. Understand that vergence is the inverse of the focal length of a lens.

2. Calculate the vergence for various lenses, including a lens with a focal length of two metres.

Pendahuluan

Durasi: 15 - 20 minutes

Kegiatan Pemanasan Emosional

Deep Breathing for Focus and Concentration

The suggested emotional warm-up activity is Deep Breathing. This simple and effective technique helps foster focus, presence, and concentration among students before beginning the lesson.

1. Ask students to sit comfortably in their chairs, with their feet flat on the ground and their hands resting on their thighs.

2. Instruct students to gently close their eyes if they feel comfortable.

3. Ask students to take a deep breath in through their noses, slowly filling their lungs with air, counting to four.

4. Instruct them to hold their breath for a tick, counting to four again.

5. Ask them to exhale slowly through their mouths, counting to four while releasing the air from their lungs.

6. Repeat this deep breathing cycle three times, counting to four at each stage: inhale, hold, and exhale.

7. After the third cycle, ask students to slowly open their eyes and notice how they feel calmer and more focused.

Kontekstualisasi Konten

Understanding the vergence of lenses is vital in various scientific and technological fields. From making spectacles and contact lenses to developing sophisticated optical devices like microscopes and telescopes, knowing how to calculate vergence is crucial. Furthermore, we encounter vergence in daily life, such as adjusting a smartphone camera to focus on an object. Comprehending vergence not only bolsters our understanding of physics but also helps us make informed choices in everyday contexts.

The connection between lenses and vergence can also relate to self-awareness and self-control. Just like we adjust a lens for a clearer view, we can modulate our emotional state to perceive situations more objectively. This skill is key for responsible decision-making and developing social skills, which will be developed further throughout this lesson.

Pengembangan

Durasi: 60 - 75 minutes

Panduan Teori

Durasi: 25 - 30 minutes

1. Vergence measures a lens's ability to converge or diverge light. Vergence (V) is defined as the inverse of the lens's focal length (f).

2. The formula for calculating vergence is: V = 1 / f, where V is the vergence in diopters (D) and f is the focal length in metres (m).

3. A converging lens (convex lens) has a positive focal length, resulting in positive vergence. Example: If a converging lens has a focal length of 2 metres, the vergence will be V = 1 / 2 = 0.5 D.

4. A diverging lens (concave lens) has a negative focal length, leading to negative vergence. Example: If a diverging lens has a focal length of -2 metres, the vergence will be V = 1 / (-2) = -0.5 D.

5. ### Practical Examples and Analogies:

6. Prescription Glasses: The vergence of lenses in spectacles is adjusted to correct vision issues like myopia or hyperopia. An optometrist prescribes lenses with specific vergences to enhance the patient's sight.

7. Cameras and Telescopes: The vergence of lenses is modified to capture sharp images of objects at varying distances. Adjusting a camera's focus is a practical example of changing vergence.

8. ### Importance of Vergence in Everyday Life:

9. Comprehending vergence aids in understanding how optical instruments operate and how they can be tailored for better vision or clearer images. The ability to calculate vergence is essential for professionals in eye care, optical engineering, and scientific research.

Kegiatan dengan Umpan Balik Sosioemosional

Durasi: 35 - 45 minutes

Exploring Lenses and Vergence

In this activity, students will collaborate in groups to calculate the vergence of different lenses and discuss how these calculations relate to real-life scenarios. The activity will also include a socio-emotional reflection component, allowing students to identify and discuss their feelings when tackling mathematical challenges.

1. Divide students into groups of 3 to 4.

2. Provide each group with a set of lenses of varying focal lengths.

3. Ask students to measure the focal length of each lens using a ruler and a light source.

4. Instruct students to calculate the vergence for each lens using the formula V = 1 / f.

5. Ask each group to record their results and prepare a short presentation on how the vergence of the lenses impacts practical applications, such as prescription glasses and cameras.

6. After calculations and presentations, invite students to reflect on their emotions throughout the activity: How did they feel facing challenges? How did they cope with frustration or enjoy the satisfaction of solving problems?

7. Facilitate a group discussion to share these reflections and provide socio-emotional feedback.

Diskusi dan Umpan Balik Kelompok

For the group discussion and socio-emotional feedback, employ the RULER method. (1) Recognize: Ask students to share their feelings during the activity. Encourage them to express emotions like frustration, satisfaction, anxiety, or confidence. (2) Understand: Discuss the triggers of these emotions. Inquire what caused positive or negative feelings and how those feelings influenced their performance. (3) Name: Assist students in accurately naming their emotions, distinguishing between feelings like frustration and discouragement or satisfaction and joy. (4) Express: Encourage students to appropriately express their emotions and share coping strategies for challenging feelings. (5) Regulate: Discuss emotional regulation techniques, like deep breathing or strategic pauses, that can assist in managing emotions during complicated problem-solving. Motivate students to apply these techniques in future scenarios.

Kesimpulan

Durasi: 15 - 20 minutes

Refleksi dan Regulasi Emosional

Invite students to write a paragraph reflecting on the challenges faced during the lens vergence calculation activity and how they managed their emotions. Alternatively, hold an open discussion where each student can share their experiences and feelings. Encourage them to think about the strategies they employed to navigate frustrations or maintain focus and how these techniques can be applied in other challenging situations.

Tujuan: The aim of this activity is to foster self-assessment and emotional regulation, helping students pinpoint effective strategies for dealing with challenging moments. This will facilitate greater self-awareness and self-control, key skills for their personal and academic growth.

Pandangan ke Masa Depan

To wrap up the lesson, ask students to set personal and academic goals linked to the content learned about vergence. These goals could include applying their knowledge in practical ways, like adjusting the lenses of a camera or exploring lenses in other subjects. Encourage them to contemplate how they can utilise the socio-emotional skills developed today in other facets of their lives.

Penetapan Tujuan:

1. Apply the concept of vergence when adjusting lenses of optical devices in everyday situations.

2. Explore further the application of lenses in various areas of physics.

3. Develop emotional regulation techniques to handle frustrations in other subjects.

4. Practice solving mathematical problems with increased confidence and reduced anxiety. Tujuan: This subsection aims to bolster students' autonomy and relevant application of learning, fostering continuity in their academic and personal journeys. By establishing clear goals, students can channel their efforts more effectively and leverage the socio-emotional skills gained to meet their objectives.