$CATEGORY: Science - Khan Academy/11.Human Eye and Colourful World/11.Human Eye and Colourful World--Scattering of Light

//Multiple Choice

Which phenomenon is responsible for the scattering of light in the atmosphere? {
    ~Reflection
    ~Refraction
    =Scattering
    ~None of the above
}

The Tyndall effect is best observed in which type of mixture? {
    =Colloidal solutions
    ~True solutions
    ~Suspensions
    ~None of the above
}

Which of the following is a real-life example of the Tyndall effect? {
    ~A rainbow
    ~A blue sky
    =Sunlight passing through a canopy of trees in a forest
    ~None of the above
}

Why does the sky appear reddish during sunrise and sunset? {
    ~Red light is scattered the most
    =Red light is scattered the least
    ~Red light is absorbed
    ~None of the above
}

Which color of light is least scattered by the Earth's atmosphere? {
    =Red
    ~Blue
    ~Violet
    ~None of the above
}

//True or False

The Tyndall effect can be observed in true solutions. {F}

The scattering of shorter wavelengths, like blue and violet, makes the sky appear blue. {T}

Colloidal particles are large enough to scatter light, but too small to be seen with the naked eye. {T}

Red light is scattered more than blue light in the atmosphere. {F}

The Tyndall effect occurs when light passes through a clear, transparent solution. {F}


//Match the following

Match the following items from Column A with their correct corresponding options from Column B\:
{
=Tyndall effect -> Scattering of light by colloidal particles
=Rayleigh scattering -> Shorter wavelengths scatter more
=Blue sky -> Phenomenon responsible for blue color of the sky
=Red sunset -> Sun appears red due to scattering of shorter wavelengths
=Colloids -> Type of mixture that exhibits the Tyndall effect
}


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