Begin the lesson by introducing the concept of light and its role in enabling us to see. Discuss how both light-emitting and non-light-emitting objects become visible to us.
Go to the LessonLesson Plans
Light, Sight and Our Eyes
Learning Objectives
- Understand how light enables us to see both light-emitting and non-light-emitting objects.
- Describe the journey of light through the eye, including the cornea, pupil, lens, and retina.
- Explain the role of the iris in controlling pupil size in different lighting conditions.
- Identify the process by which the retina converts light into electrical signals for the brain.
Introduction and Hook
Engage students with a thought-provoking question: How do we see objects that do not emit light?
Direct Instruction
Explain the journey of light through the eye, covering the cornea, pupil, lens, and retina. Discuss how the iris controls the pupil size in different lighting conditions.
Use the video 'All About Light' to support understanding of light as a form of energy and its role in visibility. This video connects light to everyday experiences and its critical function in processes like photosynthesis.
Guided Exploration
Facilitate a discussion on how light is reflected from non-light-emitting objects into our eyes, allowing us to see them.
Encourage students to explore their environment and identify objects that emit light and those that reflect light.
Hands-On Activity
Conduct an experiment to demonstrate light refraction using a glass of water, paper, and a marker. Students will observe how an arrow appears to change direction when viewed through water.
Use the 'Refracting Light' assessment to help students visualize the bending of light rays and assess their understanding through observations and conclusions.
Independent Practice
Assign students to draw and label the parts of the eye and describe the journey of light through each part.
Have students complete the 'Comprehension – Light Waves' assessment to reinforce their understanding of light waves and their interaction with the eye.
Check for Understanding
Conduct a quick quiz to assess students' comprehension of how light enables us to see and the journey of light through the eye.
Try the QuizReview and Reflection
Review the key concepts of light, sight, and the eye. Encourage students to reflect on what they learned and how it applies to their daily lives.
Assessment and Extension
Provide the 'Review – Waves and Information' assessment to evaluate students' understanding of waves and information, including sound and light wave functions.
Encourage students to explore further by researching how animals see differently than humans and presenting their findings.
