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Light Travels in Straight Lines

Readiness

Light Travels in Straight Lines

TEKS Objective

Demonstrate that light travels in a straight line until it strikes an object or travels from one medium to another and demonstrate that light can be reflected such as the use of mirrors or other shiny surfaces, and refracted such as the appearance of an object when observed through water.


Essential Understanding

The student knows that energy occurs in many forms and can be observed in cycles, patterns, and systems.

Science Background

Optics for Kids: Optical Research Associates (website) - It may be for kids, but this site makes the science of light interesting and easy for adults to understand too.

Optics for Kids
by Bruce Irving, Optical Solution Group, optics.synopsys.com

Signature Lesson

Light Travels in a Straight Line: Hamline University (website) - Simple investigation in which students use a flashlight and three index cards to demonstrate and observe that light travels in a straight line.

Light Travels in a Straight Line
Hamline University, http://serc.carleton.edu

Supporting Lessons

The Path of Light: Science Companion (PDF) – Shining a flashlight through a cloudy solution creates opportunities for students to observe how light travels. 

The Path of Light
Science Companion, www.sciencecompanion.com

How Light Travels: Alabama Learning Exchange (website) - Students experiment to demonstrate and observe that light travels in a straight line and can be reflected using mirrors.

How Light Travels
Alabama Learning Exchange, http://alex.state.al.us

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