anna studies the color of her bedroom wall using different lights. in sunlight, she sees that the wall is white. anna darkens the room and shines a beam of light that includes all the wavelengths of visible light onto the wall. in this light, what’s the wall color that anna sees?
a.) no colorb.) all seven colors of visible lightc.) redd.) whitee.)

The correct answer is option(d).

Explanation:

The light given by the combination of the all the seven colors is white color.

Generally white light splits into the band of seven colors when passed through the prism which is known as spectrum.

When the Anna shines a beam of light that includes all the wavelengths of visible light onto the wall she will observe the white light on the wall of the darken room.

Hence, the correct  option is (d).

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.

c) power lifting, will be your answer.

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deku ❤