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

[MIA6]

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?
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?

 

[Vailanor]

1. The electric field E refers to the original electric field in the absence of a dielectric material. When a dielectric material is added, the electric field is reduced by an amount equal to the electric induction (Ei). Thus, the new electric field (with dielectric) is equal to the original electric field (without dielectric) minus the electric induction. 2. Monochromatic light is used to simplify the analysis and make it easier to solve the problem. Monochromatic light is composed of a single wavelength and does not change with time. If the light is not monochromatic, the analysis becomes more complicated as the wave properties of the light must be taken into account. 3. The m in the equation m*NA = M represents the mass of a single molecule while the M represents the total mass of a sample. Therefore, the m is smaller than the M.

 

[astrokreng]

1. E refers to the electric field in both cases, but it is modified by the presence of the dielectric material. E (w/o dielectric) refers to the original electric field without the dielectric, while E (with dielectric) refers to the electric field with the dielectric present. Ei represents the electric field inside the dielectric material and k is the dielectric constant. So, the formula is saying that the electric field with the dielectric present is equal to the original electric field minus the electric field inside the dielectric, divided by the dielectric constant.

2. Monochromatic light refers to light of a single wavelength or color. This is often used in wave theory because it simplifies the calculations and allows for a more focused study of the properties of waves. If it's not monochromatic, then the wave will have a range of wavelengths and will behave differently. For example, if you shine white light through a prism, you can see the different colors of light that make up the white light. This is because each color has a different wavelength and therefore behaves differently as a wave.

3. In the formula m*NA=M, m is the mass of a single particle and M is the total mass of a mole of particles. NA is Avogadro's constant, which represents the number of particles in a mole. So, m*NA is the mass of a mole of particles, which is equal to M. In this formula, m is the smaller value, as it represents the mass of a single particle, while M is the larger value, representing the mass of a mole of particles.