You are designing a thin transparent reflective coating for the front surface of a sheet of glass. the index of refraction of the glass is 1.52, and when it is in use the coated glass has air on both sides. because the coating is expensive, you want to use a layer that has the minimum thickness possible, which you determine to be 104 nm. what should the index of refraction of the coating be if it must cancel 550-nm light that hits the coated surface at normal incidence?

Glass is transparent to visibile light under normal conditions; however, at extremely high intensities, glass will absorb most of the light incident upon it. this works through a process known as multiphoton absorption. in this process, several photons are absorbed at the same time. if very intense light whose photons carry 2ev of energy is shined onto a material with a band gap of 4ev, that light can be absorbed through two-photon absorption, because two photons have the right amount of energy to bridge the band gap. what is the minimum number of photons of 800-nm light that are needed to equal or exceed the band gap of fused silica glass

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply

What are some important factors to consider when choosing a warm-up before your workout?