Diffraction by a Grid
Material needed:

optical bench

rod, 10 cm

lamp

several riders


convex lens,

aperture with a slit
f= 50mm

grid (300 lines/mm)
convex lens,

screen
f= 100mm

power supply
1. Describe the setup of the experiment including a sketch of the optical path.
2. Describe your observations.
3. Explain the results including some theoretical facts about diffraction (You can use the
internet for your investigation).
Diffraction by a Grid
Material needed:

optical bench

rod, 10 cm

lamp

several riders


convex lens,

aperture with a slit
f= 50mm

grid (300 lines/mm)
convex lens,

screen
f= 100mm

power supply
1. Describe the setup of the experiment including a sketch of the optical path.
2. Describe your observations.
3. Explain the results including some theoretical facts about diffraction (You can use the
internet for your investigation).