Monochromatic light of variable wavelength is incident normally on a thin sheet of plastic film in air. The reflected light is a maximum only for 487.1 nm and 682.0 nm in the visible spectrum. Part A What is the minimum thickness of the film (n = 1.58)? t = 阿 ΑΣΦ 0 ? nm

A plate of glass 8.80 cm long is placed in contact with a second plate and is held at a small angle with it by a metal strip 8.60×10-2 mm thick placed under one end. The space between the plates is filled with air. The glass is illuminated from above with light having a wavelength in air of 618 nm. Part A How many interference fringes are observed per unit length in the reflected light?

A film material with n coating is 380nm thick. White light is incident perpendicularly to the coating. a. Calculate the frequency of a green light (570TH2) inside the film. 1.25 is used as a coating on a piece of flat glass (n : 1.55). The

Two slits spaced 0.0720 mm apart are 0.800 m from a screen. Coherent light of wavelength > passes through the two slits. In their interference pattern on the screen, the distance from the center of the central maximum to the first minimum is 3.00 mm. The intensity at the peak of the central maximum is 0.0300 W/m². Part A What is the intensity at point on the screen that is 2.00 mm from the center of the central maximum? Express your answer with the appropriate units. НА ? undo W I= 0.03141 m² Submit Previous Answers Request Answer x Incorrect; Try Again; 5 attempts remaining Part B What is the intensity at point on the screen that is 1.50 mm from the center of the central maximum? Express your answer with the appropriate units. ? A I = Value Units