Blue light from White light

Question

If you wanted to "create" blue light from white light, what would you need to do when given tools such as dyes?

Answer 1

To create blue light from white light using dyes, you can use the subtractive color mixing method.

Subtractive Color Mixing

Subtractive color mixing involves using dyes or pigments to filter out certain wavelengths of light, allowing only the desired color to pass through. In this case, you want to filter out all wavelengths except for blue.

Steps to Create Blue Light

1. Select a Blue Dye: Choose a dye that absorbs all other colors except blue. This dye will filter out the red and green wavelengths from the white light, leaving only blue light.
2. Prepare the Filter: Apply the blue dye to a transparent medium, such as a piece of clear plastic or glass. Ensure the dye is evenly distributed to create a uniform filter.
3. Pass White Light Through the Filter: Shine the white light through the dyed filter. The filter will absorb the red and green wavelengths, allowing only the blue light to pass through.

Example Materials

1. Blue Dye: You can use a commercially available blue dye or pigment that is known to absorb other colors effectively.
2. Transparent Medium: Clear plastic sheets, glass slides, or even a clear container can be used to hold the dye.