Electrons and Photons— Turning on the Light

What do batteries and bumpers have in common Electrochemistry chemistry in which electricity is a product or reactant. Batteries produce electricity via chemical reactions and create enough electrons to light up 

Why does a moving current create a magnetic field To be perfectly honest, no one has completely explained it yet, so we won t try here. Suffice it to say that the effect is well established and makes for some interesting chemistry, too. 

The energy carried by light depends on the type of light. The type of 

How can light be a particle and a wave This question has confounded generations of chemistry and physics students, especially because the answer is that it is neither—and it is both. Light can be modeled as a particle when the particle model is convenient, and it can be modeled as a wave when the wave model is convenient. Neither model captures the true essence of light, just one aspect. 

An analogy might be found in the common house cat. Is a house cat a domestic animal or a wild animal A cat behaves as a domestic animal when it comes when called for food or for affection, but it behaves as a wild animal as soon as a spider has the bad fortune to scuttle across its path. So is the cat domestic or wild Sometimes one description works, sometimes the other. The cat is neither and it is both. Our light is sometimes described well as a particle and sometimes as a wave. 

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