Light and Color Concepts

How is a rainbow formed?

• Sunlight reflecting off clouds.

• Raindrops splitting sunlight into different colors.

• Moonlight passing through water vapor.

• Atmospheric pressure changes.

What is the term for the band of visible colors that make up sunlight?

• Color spectrum

• Light spectrum

• Visible spectrum

• Rainbow spectrum

What is the definition of wavelength?

• The height of a wave from its resting position.

• The number of waves passing a point per second.

• The distance between consecutive crests or troughs in a wave.

• The speed at which a wave travels.

Which color in the visible spectrum has the shortest wavelength?

• Red

• Green

• Violet

• Yellow

Which color in the visible spectrum has the longest wavelength?

• Blue

• Orange

• Indigo

• Red

What phenomenon is responsible for the blue appearance of the sky?

• Refraction

• Reflection

• Tyndall Effect

• Dispersion

What are the two primary gases that make up the Earth's atmosphere?

• Carbon Dioxide and Oxygen

• Nitrogen and Oxygen

• Hydrogen and Helium

• Methane and Water Vapor

When sunlight encounters particles in the atmosphere that are larger than the wavelength of sunlight, what color does the scattered light appear?

• Blue

• Red

• White

• Violet

When sunlight encounters particles in the atmosphere that are smaller than the wavelength of sunlight, which colors are scattered more intensely?

• Longer wavelengths like red and orange.

• Medium wavelengths like green and yellow.

• Shorter wavelengths like blue and violet.

• All wavelengths equally.

Why does the sky appear blue to human eyes, despite violet light being scattered more than blue light by atmospheric particles?

• Violet light is absorbed by the atmosphere.

• Our eyes are more sensitive to blue light than violet light.

• Blue light travels faster than violet light.

• Violet light is reflected away from Earth.