Optics
Learning physics
and chemistry
easily and freely - Science for elementary school, middle school and
high school
Free online optic lesson for elementary school, middle school and high school.
Colored lights - color of objects
Decomposition of white light
1) What is white light ?
Light emitted by the Sun is white light.
Some lamps may also generate white light.
2) Décomposition of light
White light can be decomposed by a prims or diffraction grating.
- A prism is a block made of glass or another transparent material having a triangular base.
- A diffraction grating consists of fine parallel striated slits, equally spaced.
White light passing through a prism gives a serie of colored lights from violet to red and with all shades of blue, green, yellow and orange that can be observed on a white screen placed behind the prism.
All these colored lights come from the white light in which they are mixed. The prism only separates colored lights but it doesn't create them.
White light is composed of a mixture of all the colored lights that exist.
This set of colored lights is the spectrum of visible light
| Science class |
| Optics lessons |
Light sources - Types of light sources - Why can we see objects ? Propagation of light - Rectilinear propagation of light - Beams of light - Speed of light - Light and distances Shadows, lunar eclipses and phases of the moon - Formation of shadows - The Moon and eclipses Colored lights - color of objects - Decomposition of white light - Colored lights - Color of objects Image formation - Thin lenses - Thin converging and diverging lenses - Image formation by thin lenses - Vision and eyes |
|
|
©2021 Physics and chemistry