Camera red-eye
http://www.sciencenetlinks.com/sci_update.cfm?DocID=265
A lesson plan for grade 7 Science
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In this Science Update, students explore why taking flash pictures of people sometimes gives eyes a red glow. David Williams, director of the University of Rochester’s Center for Visual Science, says red-eye occurs when the camera’s flash reflects off the back of the eye into the camera lens. People can avoid red-eye by using a camera where the flash and the lens are farther apart. Science NetLinks provides a link to the audio file, a written transcript, and questions to engage students in discussion about why camera flashes cause red eyes, why that usually affects people with blue or pale eyes, and how to reduce the red-eye effect. This activity also contains links to an article about sight and human vision and to How Stuff Works, which has a piece on the inner workings of cameras.
North Carolina Curriculum Alignment
Science (2005)
Grade 7
- Goal 1: The learner will design and conduct investigations to demonstrate an understanding of scientific inquiry.
- Objective 1.01: Identify and create questions and hypotheses that can be answered through scientific investigations.
- Objective 1.05: Analyze evidence to:
- Explain observations.
- Make inferences and predictions.
- Develop the relationship between evidence and explanation.
- Objective 1.08: Use oral and written language to:
- Communicate findings.
- Defend conclusions of scientific investigations.
- Objective 1.09: Use technologies and information systems to:
- Research.
- Gather and analyze data.
- Visualize data.
- Disseminate findings to others.
- Objective 1.10: Analyze and evaluate information from a scientifically literate viewpoint by reading, hearing, and/or viewing:
- Scientific text.
- Articles.
- Events in the popular press.
- Goal 2: The learner will demonstrate an understanding of technological design.
- Objective 2.01: Explore evidence that "technology" has many definitions.
- Artifact or hardware.
- Methodology or technique.
- System of production.
- Social-technical system.
- Objective 2.01: Explore evidence that "technology" has many definitions.
- Goal 4: The learner will conduct investigations, use models, simulations, and appropriate technologies and information systems to build an understanding of the complementary nature of the human body system.
- Objective 4.02: Describe how systems within the human body are defined by the functions it performs.
