To obtain greater dispersion by a diffraction grating?
- The slit width should be increased
- The slit width should be decreased
- The slit separation should be increased
- The slit separation should be decreased
Explanation
To obtain greater dispersion by a diffraction grating, the slit separation should be decreased.
Dispersion:
- In diffraction gratings, dispersion is the separation of light wavelengths during diffraction, with greater dispersion resulting in wider color separation.
Slit separation:
- The distance between individual slits on the grating is called the slit separation.
Relationship between slit separation and dispersion:
- Smaller slit separations lead to larger angles of diffraction for a given wavelength, resulting in greater dispersion.
- Imagine the light waves as being "bent" more by the closer slits, causing them to spread out further
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