6C10.15-Adjustable Slit and Laser

Description: Using a variable width slit, you can show what happens to the diffraction pattern when the slit size is varied.

Equipment:

• Optical bench
• Laser on post
• Adjustable Slit

Setup Procedure:

1. Insert the laser into the optical bench.
2. Insert the adjustable slit into the optical bench.
3. Align the laser so it will shin on the slit.
4. Setup in the classroom to allow for the most distance between the laser and screen.

Demonstration Procedure:

1. Turn on the laser and make sure it’s lined up on the slit.
2. (Optional) Turn off the lights.
3. Note the diffraction pattern on the screen.
4. Vary the size of the slit and note the difference. To open the slit, you turn the knob clockwise.
5. When finished, turn off the laser.

Laser Light
Do not stare into the beam. Keep away from students eyes.
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