Properties of Light Chapter 23 Lesson 1 Notes

Light • Light is a wave that carries energy. It is a light source

Light – The material through which a wave travels is called a medium. –

Reflection • For the eyes to see an object, light must strike the object

Reflection – Materials that let no light pass through them are opaque.

Reflection – Transparent materials let almost all light pass through them.

Reflection – Materials that let some, but not all, light pass through are translucent.

Reflection • Describe how can she see the pages of the book she is

White Light • White light is composed of different wavelengths, which have colors ranging

White Light – Objects appear to have color because they absorb some light waves

Primary Colors – All visible colors can be made by mixing light from the

Primary Pigments – Mixing pigment to form colors is different than mixing light to

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Properties of Light Chapter 23 Lesson 1 Notes

Light • Light is a wave that carries energy. It is a light source that emits a countless number of light rays that travel in all directions.

Light – The material through which a wave travels is called a medium. – Light is an electromagnetic wave that does not need a medium in which to travel.

Reflection • For the eyes to see an object, light must strike the object and bounce off, a process called reflection.

Reflection – Materials that let no light pass through them are opaque.

Reflection – Transparent materials let almost all light pass through them.

Reflection – Materials that let some, but not all, light pass through are translucent.

REVIEW

Reflection • Describe how can she see the pages of the book she is reading.

White Light • White light is composed of different wavelengths, which have colors ranging from red to violet.

White Light – Objects appear to have color because they absorb some light waves and reflect others; an object appears the color of the light it reflects. – Why is the sky blue?

Primary Colors – All visible colors can be made by mixing light from the three primary colors of red, blue, and green.

Primary Pigments – Mixing pigment to form colors is different than mixing light to form colors. The primary pigment colors are yellow, magenta, and cyan.