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OUTCOME
By the end of this lesson I will be ale to explain how diffraction patterns created when light travels through very small opening allows scientists to deduce the shape of molecules
Diffraction happens when light travels through very small spaces, making it bend and creating patterns. These patterns can be used to determine what the original shape of the spaces and the structure making the spaces is. This is how the structure of DNA was determined by Rosalind Franklin.
LEARNING TASKS
Explain
1. What is the difference between x-rays and visible light?
2. Why did Rosalind need to use x-rays for her experiment with DNA
3. Use a diagram to show how the double helix ends up as a cross in the diffraction pattern
Explore and Elaborate
Activity: Use the laser and the diffraction slide to observe diffraction through very fine slits
Try to use the laser to model Franklin's DNA experiment with the spring from a pen
Evaluate
How does diffraction relate to the synchrotron light created in accelerators?
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