When viewing a piece of art that is behind glass, one often is affected by the light that is reflected off the front of the glass (called glare), which can make it difficult to see the art clearly. one solution is to coat the outer surface of the glass with a thin film to cancel part of the glare. a) if the glass has a refractive index of 1.59 and you use , which has an index of refraction of 2.62, as the coating, what is the minimum film thickness that will cancel light of wavelength 560 nm? answer is 107 nmb) if this coating is too thin to stand up to wear, what other thicknesses would also work? find only the three thinnest ones.

A3.9 g aluminum foil ball with a charge of +4.1×10−9 c is suspended on a string in a uniform horizontal e⃗ field. the string deviates to the right and makes an angle of 30∘ with the vertical. part a part complete what information about the e⃗ field can you determine for this situation? what information about the field can you determine for this situation? only the magnitude of e⃗ only the direction of e⃗ both the magnitude and the direction of e⃗ none of the above previous answers correct part b determine the magnitude of the electric field. express your answer with the appropriate units. e e = nothing nothing request answer part c determine the direction of the electric field. determine the direction of the electric field. to the right to the left away from you toward you

In the circuit shown below, with each bulb holding a resistance of 60 ohms, how many amps of current are flowing? express your number as a decimal.

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false