How squids change colour or turn transparent on demand , Pg11

Key Highlights:

• Squids can change color or turn transparent due to iridophores in their skin.
• Iridophores contain platelets with a wave-like pattern affecting refractive index.
• Researchers created artificial materials mimicking this structure that change color and transparency under visible light.
• These materials have potential applications in camouflage, heat control, displays, and sensors.

Detailed Insights:

• The dorsal mantle of squids contains iridophores, specialized skin cells crucial for color change.
• The unique wave-like pattern in the refractive index of platelets within iridophores enables dynamic color display.
• Artificial materials mimicking the squid's skin structure can be manipulated to alter color and transparency.
• Potential applications extend to military camouflage, adaptive building materials for heat control, and advanced display technologies.

Scientific/Technical Concepts Involved:

• Iridophores: Specialized skin cells in squids responsible for color change and transparency.
• Refractive Index: A measure of how much light bends when passing from one medium to another.
• Platelets: Small, flat structures within iridophores that contribute to the wave-like pattern affecting light interaction.