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

//Multiple Choice

Why is the sky blue? {
    ~Due to reflection of sunlight
    =Due to scattering of shorter wavelengths of light
    ~Because of absorption of light by water vapor
    ~None of the above
}

Which phenomenon is responsible for the blue color of the sky? {
    ~Diffraction
    =Scattering
    ~Reflection
    ~Absorption
}

Which component of sunlight is scattered the most in the atmosphere? {
    ~Red
    ~Green
    =Blue
    ~None of the above
}

Why does the sun appear yellow during midday? {
    ~The atmosphere absorbs blue light
    ~Yellow light is more scattered
    =Most of the blue light is scattered, leaving yellow to reach our eyes
    ~None of the above
}

What causes the sun to appear red during sunrise and sunset? {
    ~Longer wavelengths like red are scattered more
    =Longer wavelengths like red pass through easily
    ~The sun emits more red light
    ~None of the above
}

//True or False

The sky appears blue because red light is scattered more than blue light. {F}

The sun appears yellow at noon because the blue light is scattered away from the direct path of sunlight. {T}

During sunset, red light is scattered the most, making the sun appear red. {F}

Rayleigh scattering explains why shorter wavelengths of light, like blue, are scattered more effectively than longer wavelengths. {T}

If Earth had no atmosphere, the sky would appear blue. {F}

//Fill in the blanks



//Numericals



//Match the following

Match the following items from Column A with their correct corresponding options from Column B\:
{
=Rayleigh scattering -> The sky appears blue due to this
=Longer wavelengths -> Cause the sun to appear red at sunrise/sunset
=Blue light -> Scattered more than red light
=Yellow sun at noon -> Caused by scattering of shorter wavelengths
=Scattering -> Phenomenon responsible for blue sky and red sun
}


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