Question

Optical brighteners reflect the blue white light causing colors to be brighter but ___________.

1) They can cause yellowing of fabrics over time.
2) They can cause skin irritation.
3) They can cause allergic reactions.
4) They can cause discoloration of certain materials.

Answer 1

Optical brighteners make colors appear brighter by reflecting blue-white light, but can also cause yellowing, skin irritation, allergic reactions, and discoloration.

Step-by-step explanation:

Optical brighteners reflect blue-white light, making colors appear brighter. However, they can cause some unintended effects like yellowing of fabrics over time, skin irritation, allergic reactions, and discoloration of certain materials. The bright appearance is due to the presence of fluorescent dyes that absorb ultraviolet or blue light and then emit light at different wavelengths. Over time, the chemical reactions involved can break down, leading to yellowing, or interact with skin and materials in ways that cause irritation, reactions, or discoloration.

Optical brighteners reflect the blue white light, causing colors to be brighter but can cause discoloration of certain materials. Optical brighteners are substances that absorb ultraviolet or blue light and emit visible light, making colors appear brighter and whiter. However, they can react with various organic substances, causing damage or discoloration over time.