FIGURE P33.49 shows the interference pattern on a screen behind a diffraction grating. The wavelength of the light is . How many lines per millimeter does the grating have?
The grating hasof lines per millimetre.
The bright fringes diffraction grating as
The place of bright fringes as
The spacing and grating value as
The number of lines is
In a double-slit interference experiment, which of the following actions (perhaps more than one) would cause the fringe spacing to increase? (a) Increasing the wavelength of the light. (b) Increasing the slit spacing. (c) Increasing the distance to the viewing screen. (d) Submerging the entire experiment in water.
You've found an unlabeled diffraction grating. Before you can use it, you need to know how many lines per it has. To find out, you illuminate the grating with light of several different wavelengths and then measure the distance between the two first-order bright fringes on a viewing screen behind the grating. Your data are as follows:
Use the best-fit line of an appropriate graph to determine the number of lines per .
Helium atoms emit light at several wavelengths. Light from a helium lamp illuminates a diffraction grating and is observed on a screen behind the grating. The emission at wavelength creates a first-order bright fringe from the central maximum. What is the wavelength of the bright fringe that is from the central maximum?
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