13. Determination of wavelength using a diffraction grating

  • laser pen

  • stand and clamp

  • diffraction grating

  • screen

  • metre rule

  • 30 cm ruler or digital callipers

Hazard Risk Control measure


Lasers produce extremely intense light which can damage the retina.

Students should wear eye protection and NEVER LOOK directly at the laser beam.

Tripping hazard

Darkened laboratory – beware of tripping hazards as you will be working in the dark.

Ensure there is nothing on the floor which could be a hazard and make sure you only have the necessary equipment and apparatus on your work place.