Single Slit Experiment


  •  To find the wavelength of a given laser using the slit of known width.
  • To find the slit width knowing the wavelength of light used.
  • Proving the concept of the Heisenberg uncertainty principle.


Diffraction is a phenomenon of bending of waves when it encounters obstacles or narrow opening. A basic setup to observe diffraction consists of a laser, a slit, screen placed at a distance. The wavefronts are partially obstructed by the slit. The intensity distribution of the diffraction pattern consists of a series of light and dark fringes with the intensity distribution symmetric along the central axis. The primary peak is called the central maxima. The corresponding peaks are called secondary, and tertiary maxima. This is studied using the single-slit experiment.


  • Precise Optical Alignment: The optical alignment of the components is attained by the optical bench, the set-up time is faster and experimentation is easy.
  • Digital Lux Meter with Transverse Saddle: The digital Lux meter enables the measurement of light intensity. The transverse saddle helps in the fine movement of the Lux meter perpendicular to the direction of light.


OB1 Optical Bench Set 0.8m 1
HA003 Laser Source Holder 1
HA012 Adjustable Collimating Slit Holder 1
HA512 Travelling Light Sensor Holder 1
DP1 Data Processor 1
PH61022D/2 Power Supply for Light Source 1

Complete Equipment Set with Instruction Manual from catalogue.