SP212/3321&5521
Chapter 35 - Worksheet #1
Question 1: Two blocks, each of length L=1.2 µm, are stacked on top of each other. One block
has index of refraction n2 =1.8, while the other has index of refraction n1 =2.1. What is the longest
wavelength (in air) of incident monochromatic electromagnetic radiation such that beams passing
through the two blocks will destructively interfere?
L
n2
λ?
n1
Question 2: A Youngs double-slit interference experiment is performed with monochromatic light,
and the two slits are separated by 0.550 mm. In the interference pattern on a screen 3.20 m away
from the slits, the second minimum is 4.75 mm away from the center of the pattern. What is the
wavelength of the light?
Question 3: A Youngs double-slit interference experiment is performed with monochromatic light of
wavelength λ=650 nm, and the two slits are separated by 0.350 mm. (a) What is the largest order
maximum visible? In the interference pattern on a screen 3.00 m away from the slits, what is the
distance between the second and third maxima?