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Homework #2-solutions

# Homework #2-solutions - mehta(snm425 Homework 2...

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mehta (snm425) – Homework 2 – erskine – (58715) 1 This print-out should have 12 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points Light illuminates two closely spaced thin slits and produces an interference pattern on a screen behind. How will the distance between the fringes of the pattern differ for red light and blue light? 1. The same spacing for both 2. Closer for red light 3. Farther apart for red light correct Explanation: The fringes will be spaced father apart when the pattern is made of longer- wavelength red light. 002 10.0 points A double slit arrangement produces an inter- ference fringe for yellow sodium light. To produce narrower-spaced fringes, should red light or blue light be used? 1. Red 2. Either 3. Blue correct Explanation: Blue light has a shorter wavelength than both yellow and red light and will produce narrower-spaced fringes. 003 10.0 points What happens to the distance between inter- ference fringes if the separation between two slits is increased? 1. Increases 2. Remains unchanged 3. Decreases correct 4. The fringes disappear. Explanation: Fringes become closer together as the slits are moved father apart. 004 10.0 points A double-slit interference experiment is per- formed with light from a laser. The separa- tion between the slits is 0.50 mm, and the first-order maximum of the interference pat- tern is at an angle of 0.059 from the center of the pattern.

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Homework #2-solutions - mehta(snm425 Homework 2...

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