Light Scattering and Color Perception

What phenomenon explains why the sky is blue and the sun appears red at sunrise or sunset?

• Reflection of light

• Refraction of light

• Dispersion of light

• Scattering of light

What is the phenomenon called when a beam of light becomes visible as it passes through a colloid?

• Reflection

• Refraction

• Tyndall effect

• Dispersion

Which of the following can scatter light in the atmosphere?

• Air molecules

• Water droplets

• Dust particles

• All of the above

What is the approximate wavelength range of visible light?

• 100 nm to 200 nm

• 400 nm to 700 nm

• 800 nm to 1000 nm

• 1 mm to 10 mm

What color does a beam of white light appear when scattered by dust particles?

• Blue

• Red

• White

• Green

Which color of visible light is scattered the most by air molecules?

• Red

• Green

• Yellow

• Blue

Why does the sky appear blue?

• Due to the reflection of blue oceans

• Due to preferential scattering of blue light by air molecules

• Due to the presence of blue clouds

• Due to the absorption of all other colors by the atmosphere

What color would the sky appear if there was no atmosphere?

• White

• Blue

• Black

• Red