17.1 Understanding Diffraction and Interference
What is the longest wavelength of light passing through a single slit of width 1.20 μm for which there is a first-order minimum?
- 1.04 µm
- 0.849 µm
- 0.600 µm
- 2.40 µm
17.2 Applications of Diffraction, Interference, and Coherence
Suppose pure-wavelength light falls on a diffraction grating. What happens to the interference pattern if the same light falls on a grating that has more lines per centimeter?
- The bands will spread farther from the central maximum.
- The bands will come closer to the central maximum.
- The bands will not spread farther from the first maximum.
- The bands will come closer to the first maximum.
How many lines per centimeter are there on a diffraction grating that gives a first-order maximum for 473 nm blue light at an angle of 25.0°?
- 529,000 lines/cm
- 50,000 lines/cm
- 851 lines/cm
- 8,934 lines/cm
What is the distance between lines on a diffraction grating that produces a second-order maximum for 760-nm red light at an angle of 60.0°?
- 2.28 × 104 nm
- 3.29 × 102 nm
- 2.53 × 101 nm
- 1.76 × 103 nm