The phenomenon which is not involved in the formation of rainbow is

Key Points

• Diffraction is the bending of light waves around obstacles or through small slits.
• Rainbow formation is primarily governed by refraction, dispersion, and total internal reflection.
• Diffraction does not contribute to the formation of a rainbow.
• The absence of diffraction is due to the relatively large size of water droplets compared to the wavelength of visible light.

Important Points

• The phenomenon of rainbow formation involves the interplay of refraction, dispersion, and total internal reflection.
• Sunlight enters water droplets in the atmosphere, where these processes occur to produce the spectrum of colors.

Additional Information

• Dispersion: Dispersion occurs when light splits into its component colors due to varying refractive indices for different wavelengths. It is a crucial part of rainbow formation.
• Total Internal Reflection: This phenomenon occurs when light is reflected entirely within the water droplet due to its angle being greater than the critical angle.
• Refraction: Refraction is the bending of light as it passes from one medium to another. It happens when light enters and exits the water droplet, contributing to the bending and separation of colors.
• Diffraction: Diffraction involves the bending of light waves around obstacles or edges. In the context of a rainbow, diffraction is negligible because water droplets are much larger than the wavelength of visible light.