Answer:
1. Absorption of light
Waves can be absorbed at the boundary between two different materials. When waves are absorbed by a surface, the energy of the wave is transferred to the particles in the surface. ... When white light shines on an opaque object, some wavelengths or colours of light are absorbed.
2. The intensity or brightness of light as a function of the distance from the light source follows an inverse square relationship. ... Notice that as the distance increases, the light must spread out over a larger surface and the surface brightness decreases in accordance with a "one over r squared" relationship
Explanation:
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