A wave based explanation for double slit diffraction patterns You will need: A compass, with the...
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Transcript of A wave based explanation for double slit diffraction patterns You will need: A compass, with the...
A wave based explanation for double slit diffraction patterns
You will need:
• A compass, with the centre screw firmly tightened
• A sharp pencil
• A sheet of A4 graph paper
• A 30cm ruler.
A wave based explanation for double slit diffraction patterns
• Place your graph paper on the desk (landscape orientation).
• Make small pencil marks on the long edge along the bottom of the paper, at 12cm and 16cm.
• Set your compass to a radius of 1cm. Draw a semicircle, centred on the mark at 12cm.
• Draw a second semicircle, centred on the mark at 16cm.
• Repeat this process, with the compass radius set at 2cm, 3cm, 4cm, 5cm, 6cm and 7cm.
A wave based explanation for double slit diffraction patterns
• Draw a small dot, preferably in red ballpoint pen, in each place a wave crest meets another wave crest.
A wave based explanation for double slit diffraction patterns
….Like this….!
A wave based explanation for double slit diffraction patterns
• The dots should line up to show where we are getting constructive interference. Join the points with lines to show where the bright fringes will occur.