Short Answer
17.1 Understanding Diffraction and Interference

The bands would be closer together.

The bands would spread farther apart.

The bands would remain stationary.

The bands would fade and eventually disappear.

The width of the spaces between the bands will remain the same.

The width of the spaces between the bands will increase.

The width of the spaces between the bands will decrease.

The width of the spaces between the bands will first decrease and then increase.

667\,\text{nm}

471\,\text{nm}

333\,\text{nm}

577\,\text{nm}
What is the longest wavelength of light passing through a single slit of width 1.20 Î¼m for which there is a firstorder minimum?
 1.04 Âµm
 0.849 Âµm
 0.600 Âµm
 2.40 Âµm
17.2 Applications of Diffraction, Interference, and Coherence

A diffraction grating is a large collection of evenly spaced parallel lines that produces an interference pattern that is similar to but sharper and better dispersed than that of a double slit.

A diffraction grating is a large collection of randomly spaced parallel lines that produces an interference pattern that is similar to but less sharp or welldispersed as that of a double slit.

A diffraction grating is a large collection of randomly spaced intersecting lines that produces an interference pattern that is similar to but sharper and better dispersed than that of a double slit.

A diffraction grating is a large collection of evenly spaced intersecting lines that produces an interference pattern that is similar to but less sharp or welldispersed as that of a double slit.
Suppose purewavelength 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 firstorder maximum for 473 nm blue light at an angle of 25.0Â°?
 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 secondorder maximum for 760nm red light at an angle of 60.0Â°?
 2.28 Ã— 10^{4} nm
 3.29 Ã— 10^{2} nm
 2.53 Ã— 10^{1} nm
 1.76 Ã— 10^{3} nm