It's kindling a flame, one of the prohibitions on Shabbat.
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In Jewish law, the act of creating a spark by turning on a light is considered lighting a fire, which is prohibited on Shabbat. Observant Jews refrain from using electricity or turning on lights during Shabbat to adhere to this prohibition.
BLACK because the apple absorbs the blue light and there would be no light to reflect.
Turn down the light.
The clouds turn pink and purplish at sunset because the light becomes polarized.
The weather itself does not directly cause the sky to turn purple. Instead, atmospheric conditions such as scattering of light particles during sunset or sunrise can create the illusion of a purple sky.
The sun appears red during sunrise and sunset due to the scattering of light in Earth's atmosphere. When the sun is low on the horizon, its light has to pass through more of the atmosphere, scattering shorter wavelengths like blue and green light, and leaving behind longer wavelengths like red and orange light. This gives the sun a red appearance.