Echellette Grating (Hughey)
- Page ID
- 290966
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Name
Echellette Grating. A diffraction grating has 25,000 grooves uniformly spaced over 25 mm. It is illuminated at normal incidence by white light (380 – 700 nm). Find the angular range of the first-order and second order spectrum produced by the grating.
- d (m) = _____________________________________
- Fill out the table below.
λ, nm
Color
λ, m
(1st order)
θr (degrees)
(1st order)
λ, m
(2nd order)
θr (degrees)
(2nd order)
400
violet
4.00x10-7
23.6
4.00x10-7
465
blue
550
green
580
yellow
605
orange
700
red
- Sketch an Echellette grating and show how the visible radiation is dispersed according to your calculations in the table above. Be sure to label ALL aspects of your drawing (e.g., d, θi, θr (λ or color) and n).
Contributors and Attributions
- Christine Hughey, James Madison University (hugheyca@jmu.edu)
- Sourced from the Analytical Sciences Digital Library