The Speed Of Light
Along with water, the Moon, and many more, sunlight is extremely fundamental. Though you can't actually see, feel, touch or smell light, light is important in many ways. Solar-powered batteries, electricity and more come from light. As you can't feel light, light still hits you very fast.
The speed of light is estimated to be around 300,000 km/h and the Earth is 149.6 million km away from the Sun, so...
How long does it take for light to reach Earth?
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