PicoScope 5000 Series

Flexible resolution oscilloscopes

PicoScope 5000 Series - Elektra Awards Winner 2013

High speed and high resolution. Breakthrough ADC technology switches from 8 to 16 bits in the same oscilloscope.

From just £739.00


Light intensity variation across a diffraction pattern


The results obtained from the experiment are shown below.


Answers to questions

Q. Explain why the pattern occurs.
A. The multiple slits of the grating act as discreet light sources which interface destructively and constructively.

Q. Why did the minimum light level not drop to zero?
A. This was due to the background ambient light level.

Q. How would the pattern be affected if the DrDAQ was further away from the diffraction grating?
A. The maxima would be further apart but at the same amplitude as before.

Q. Why are not all the maxima the same height?
A. The envelope of the maxima follows the diffraction pattern due to a single slit since each slit produces this envelope.

Q. Calculate angular positions of the maxima to m=3. What is the maximum order? (Assume: Wavelength = 670 nm, diffraction grating has 3000 lines cm-1)
A.  Θ1=11.5 °,  Θ2=23.5 °, Θ3=36.9 °, m=4

Teachers’ notes

The maxima envelope shown above is not quite the expected theoretical one (there should be symmetry about the central axis with the 4th peak being the highest). This was probably due to the difficulty of keeping DrDAQ vertical during the scan. Mounting the board on a trolley, or using an external light sensor may have given better results.

Credits, comments and further Info

This experiment was performed and written up by Dr Cooke of Hallam Consultants.

Hallam consultants is a Sheffield (UK) based educational and scientific consultancy specialising in Physics. Bob Cooke can be contacted on 0114 2301283.


  • I have been using my 4224 PicoScope for years. I travel abroad so this has been ideal due to its physical size. Storage of waveforms on my Laptop is very easy allowing me to quickly email waveforms to my Colleagues.

  • Not many USB scopes works on Win & Mac & Linux too, so that proves me that guys from Pico really cares about us, customers. This made my decision much easier when I was looking to buy an USB scope.

    Raul Trifan
  • We have been using Picoscope 6404D for quite some time, and are amazed by its accuracy and powerful emulations while working with numerous signal evaluations.

    J Mohanty
  • PicoLog TC-08: This is a very nice unit that works consistently and reliably.

    Jeff Hulett
  • It is a great scope. I had a weird problem - it did not work on one of my PC’s. Customer service gave me first class service. If I could give 6 stars for customer service - I would do so.

    Niels Larsen
  • Perfect Partner for Development of Encoder controlled Stepper Motor Actuators. Since the included software is really stable, this type of device is a great tool for great tasks!

    Helmut Schoettner
  • A superb piece of equipment worth its weight in gold

    Nigel Clinch
  • So simple to use & beats any other I have ever used hands down.

    John D Samsing
  • Great functionality in a compact size. I really like moving the mouse pointer to a position and having the Time and Voltage display the values at that point. Calibration equipment is a breeze with that feature.

    Don Horein

PC oscilloscope and data logger products

Tel: +1 800 591 2796 (Toll Free)