Describe how the colors of available light sources and the bending of light waves determine what we

 Expanded Standard header image

Disciplinary Core Idea

PS4: Waves and their Application in Technologies for Information Transfer

A student saw a rainbow outside after school. The next day the student decided to model how rainbows form. The student shines white light through a glass prism and sees how the light splits up into many colors.

A student saw a rainbow outside after school. The next day t

Which two ways does the student’s model need to be changed to better show how rainbows are formed?

Standard Text and Component Idea

Explanation and Support of Standard

Crosscutting Concept

Science and Engineering Practice

4.PS4.2 Describe how the colors of available light sources and the bending of light waves determine what we see.

Component Idea:

B. Electromagnetic

 

Emphasis: Objects can be seen when light reflected from the surface of objects is detected by light receptors in our eyes. In first grade, students saw that objects are visible because they either reflect or emit their own light and may produce shadows depending on whether or not light passes through them.

White light can be produced from a combination of red, green, and blue light, but some activities may be better supported by explaining that white light contains the full spectrum of colors, ROYGBIV. Students can examine and record how the appearances of objects (solid-color and multi-color) change depending on the light source. Prisms can be used to bend light so that it is separated into component colors. Lenses and combinations of lenses can bend light to magnify or focus light for objects that cannot be seen with the naked eye.

Cause and Effect

Students routinely search for cause and effect relationships in systems they study.

Analyzing and interpreting data.     

Students should organize data (observations and measurements) in a manner which faciltates further analysis and comparisons.