How does the energy of light travel from the Sun to the Earth?
ABy conduction through metal
BBy radiation through space
CBy convection through air
DBy friction through dust
Answer & Solution
Correct answer: B. By radiation through space
1. Between the Sun and the Earth there is empty space with no material to touch.
2. Light energy still crosses it, travelling in straight lines.
3. This way of transferring energy without any material is called radiation.
_Source: Siyavula Natural Sciences Grade 8 (CC BY 4.0), Radiation of light_
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