The interference pattern created from a diffraction grating with 10 slits is most similar to that of a: a. single slit pattern b. double slit pattern c. thin film pattern d. two of the above e. none of the above

12. A different diffraction grating apparatus has a line density of 18,000 lines per centimetre. You have an adjustable laser. What wavelengths would produce 5 bright lines on a screen, if non-visible EM radiation is possible?

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2. The 5th order dark fringe of 33 nm is observed at an angle of 40° when the light falls on 2 narrow slits. How far apart are the slits?

6. For double-slit interference, what is the minimum fraction of slit spacing over wavelength that will allow us to still use the small angle approximation?

6. A beam of light traveling in air has a wavelength of 475 nm. If the light illuminates a diffraction grating with 3000 lines/cm, what is the angle of the second-order bright spot produced? f19 0 oof19

3. A single slit is used to create an interference pattern on a screen using light. Consider the statements that follow with respect to the pattern generated: I. A longer wavelength of light generates a wider central maximum. II. When using white light, the outer fringes are coloured. III. A narrower slit generates a wider central maximum. Which of the above statements is/are incorrect? a. b. c. I only I and II only I and III only d. e. I, II, and III none

3. Light from a monochromatic source shines on a single slit. Which of the intensity patterns shown below best illustrates the interference pattern observed on a screen beyond the double slit wall?