In a double-slit experiment the distance between slits is 4.7 mm and the slits are 0.75 m from the screen. Two interference patterns can be seen on the screen: one due to light of wavelength 420 nm, and the other due to light of wavelength 660 nm. What is the separation in meters on the screen between the third-order (m=3) bright fringes of the two interference patterns?

How have the competing explanations' experiments on atoms affected the development of the atomic model?

Antireflective coatings on solar cells are often made by applying a thin film of silicon nitride (sinx), which has an index of refractive of 1.2, on the top of the silicon solar cell, which has a refractive index of about 3.5. however, the sun emits radiation of various wavelengths which the solar cell absorbs, and the antireflective coating can only absolutely minimize the reflection of one of these wavelengths. the coating thickness is chosen to reduce the reflection of green/yellow light (e = 2.2 ev), which is the most intense color in the solar spectrum (shown below). which of the following coatings would minimize reflection of green/yellow light? the answer is 820 nm how? what is the angular width of the central maximum of an electron traveling at 2 x 108 m/s going through a single slit of width 1 mm.

What does si stand for,when referring to a system of measurement