1. Light of 630 nm wavelength illuminates a double slit The intensity pattern sh
ID: 1397562 • Letter: 1
Question
1. Light of 630 nm wavelength illuminates a double slit The intensity pattern show in the figure is seen on a screen 2.5 m behind the slits. a. what is the spacing (in nm) between the Intensity slits? 2. A 1.0 cm thick layer of water stands on a horizontal slab of glass. A light ray in the air is incident on the water 54 from the normal. x (cm) a. What is the ray's direction of travel in the glass 3. Light of wavelength 460 nm illustrates a double slit, and the interference pattern is observed on a screen. a. At the position of m 3 bright fringe, how much farther is it to the more distant slit than the rearer slit?Explanation / Answer
1) from the figure, slit width, beta = 1/3 = 0.33 cm = 0.033 m
we know, beta = lamda*R/d (here lamda is wavelength, R is distance between slits and screen and d is lit spacing)
==> d = lamda*R/beta
= 630*10^-9*2.5/0.033
= 4.7*10^-5 m
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