Two slits are seperated by 0.320 mm. A beam of 500 nm light strikes the slits, producing an interference pattern. Determine the number of maxima observed in the angular range −30 <θ<30.0

A laser beam with wavelength λ = 550 nm hits a grating with n = 2250 grooves per centimeter. Part (b)  Find the sin of the angle, θ2, at which the 2nd order maximum will be observed, in terms of d and λ.  sin(θ2) =

The Michelson interferometer can be used to measure the index of refraction of a gas by placing an evacuated transparent tube in the light path along one arm of the device. Fringe shifts occur as the gas is slowly added to the tube. Assume 580-nm light is used, the tube is 5.40 cm long, and 152 fringe shifts occur as the pressure of the gas in the tube increases to atmospheric pressure. What is the index of refraction of the gas? Hint: The fringe shifts occur because the wavelength of the light changes inside the gas-filled tube. (Give your answer to five decimal places.) 4.0

Monochromatic light of wavelength 592 nm is incident on a single slit. The second-order diffraction minimum is at an angle of 7.10 ✕ 10−3 rad. What is the width of the slit?