1. E (with dielectric) = E (w/o dielectric) – Ei =E/k what is E then? Original Electric field? But I thought the original one was E without dielectric? Do these two both refer to the same electric field?(adsbygoogle = window.adsbygoogle || []).push({});

2. Whether it's "First the wave theory" or any questions relating to wave in high school course, the question always says: assuming monochromatic light. So why every time it’s monochromatic? what if it's not? what will happen?

3. m* NA=M, NA is Avogadro’s constant. I am always confused with this formula. Which is bigger in this formula, little m or big M?

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# E (with dielectric) = E (w/o dielectric) – Ei =E/k

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