A phase change occurs whenever light reflects off of a medium with a lower refractive index than the medium that the light is currently in. O True O False Constructive interference only occurs for a thin film with an even number of phase changes. True False

The following problem must be solved taking into consideration the modification given below: A student holds a laser that emits light of wavelength 545 nm. The laser beam passes though a pair of slits separated by 0.500 mm, in a glass plate attached to the front of the laser. The beam then falls perpendicularly on a screen, creating an interference pattern on it. The student begins to walk directly toward the screen at 2.00 m/s. The central maximum on the screen is stationary. Find the speed at which the 5th-order maxima changes its position on the screen. Do not use small angle approximation. Modification: Suppose there is a liquid in the space between the slits and the screen. Give such liquid any refractive index you desire (numerical value). Also suppose that the screen has a finite lenght (give another numerical value). Besides calculating the speed at which the 5th-order maxima changes its position on the screen also calculate the initial value of bright fringes according to the…

Mourning doves have a small batch of iridescent feathers. The color isproduced by a 260-nm-thick layer of keratin (n = 1.56), with air on both sides that are found around the edge of the feather barbules. For what visible wavelength (or wavelengths) would this structure produce constructive interference? A) 686nm, 412nmB) 406nmC) 686nm, 541nm, 412nmD) 541nmE) 1622nm, 811nm, 270nm

A thin film of oil is on water. What is the thinnest that the oil can be to have constructive interference on reflection? The wavelength of the light in air is 480nm. Assume the beam starts in air. [n =1.00 ,n =1.50 , nwaer =1.33]

If the wavelength of light used in Young's double slit experiment is decreased, which one of the following statements is true of the interference pattern? O The distance between the minima stays the same. The distance between the maxima decreases. The distance between the minima increases. The distance between the maxima stays the same.

The figure below shows a radio wave transmitter and a receiver separated by a distance d = 50distance d = 50, 0 m, both being at a height h = 35, 0 m above the ground. The receiver canThe receiver can receive signals either directly or indirectly from reflected signals on the ground. Suppose that theground is leveled and a 180o phase shift occurs in the reflection.Determine the longest wavelengths that interferea. constructively;b. destructively.