Name: ________________________________________
Leaving Cert Physics Mandatory Experiment.
MEASUREMENT OF THE WAVELENGTH OF MONOCHROMATIC
LIGHT (using the laser)
Apparatus
Laser, diffraction grating (600 lines per mm), 2 metre sticks.
Fully labelled diagram of the apparatus used:
Procedure:
________________________________________________________
________________________________________________________
________________________________________________________
________________________________________________________
________________________________________________________
________________________________________________________
________________________________________________________
________________________________________________________
________________________________________________________
________________________________________________________
________________________________________________________
________________________________________________________
________________________________________________________
________________________________________________________
Results:
n
x(m)
y(m)
θ
d
λ
λ average =
Conclusion:
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
Sources of error:
1. ___________________________________________________________
___________________________________________________________
2. ___________________________________________________________
___________________________________________________________