Diffraction Grating
Column1
Column2
Column3
Column4
Column5
Column6
Column7
Column8
Data
Calculations
λ (nm)
lines/mm
L (cm)
Mode           Â
(m or p)
y (cm)
Calc. Angle
Obs. Angle
%D
532
600
600.1
1
104.5
532
600
373.0
1
127.2
532
600
600.1
2
126.4
532
600
373.0
2
289.3
650
600
221.0
1
100.0
650
600
357.9
1
151.1
650
600
221.0
2
417.0
650
600
357.9
2
448.1
Using the part 1 data from your...
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Question
Physics
Diffraction Grating
Column1
Column2
Column3
Column4
Column5
Column6
Column7
Column8
Data
Calculations
λ (nm)
lines/mm
L (cm)
Mode            (m or p)
y (cm)
Calc. Angle
Obs. Angle
%D
532
600
600.1
1
104.5
532
600
373.0
1
127.2
532
600
600.1
2
126.4
532
600
373.0
2
289.3
650
600
221.0
1
100.0
650
600
357.9
1
151.1
650
600
221.0
2
417.0
650
600
357.9
2
448.1
Using the part 1 data from your physics lab abovecalculate the following; calculated angle, observed angle andpercent difference (show all work outside the table)
For parts 1, 2, 3, and 4., use L and y to calculate theobserved angle. Excel works in radian mode. You can force it intodegree mode by using: sin(radians(B4)) or degrees(asin(C4/D4))where B4 is your angle in degrees and C4 and D4 would be distancemeasurements.
For parts 1, 2, and 3, use the wavelength, order number, etc.,to calculate the expected angle.
For parts 1, 2, and 3, calculate the percent difference betweenthe observed and expected angle.
Answer & Explanation
Solved by verified expert
3.7 Ratings (288 Votes)
For a grating the observed angle is given byThe theoretical value of angle is
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