Figure 5.14 illustrates the interference experiment with Fresnel mirrors. The angle between the mirrors is a = 12', the distances from the mirrors' intersection line to the narrow slit S and the screen Sc are equal to r = 10.0 cm and b = 130 cm respectively. The wavelength of light is λ, = 0.55 pm. Find:
(a) The width of a fringe on the screen and the number of possible maxima;
(b) The shift of the interference pattern on the screen when the slit is displaced by δl = 1.0 mm along the arc of radius r with centre at the .point O;
(c) At what maximum width 5nax of the slit the interference fringes on the screen are still observed sufficiently sharp.

Transcribed Image Text:

Sc S'. S".