assignment B

Wave Optics Name:

A single change is made to a double-slit apparatus resulting in a new pattern on a screen as shown in the figure below.

1. For each labeled fringe, give the appropriate ΔD (in terms of λ) for the original and new pattern

on the figure.

Original pattern on screen

New pattern on screen

Center of screen

A. a.

B. b.

C. c.

D. d.

E. e.

2. For each of the following quantities, determine whether a change in that quantity could produce the new pattern shown.

If so: Should the quantity be increased or decreased? Explain your reasoning. If not: Explain why not.

• the distance between the slits

• the wavelength of the laser light

• the distance from the mask to the screen.

a b c d e

A B C D E