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SELF-ASSESSMENT CHECKLIST
I am able to ...
Section
NotÂ yet
Nearly there
Ready to move on
understand refraction using wavefronts and rays
14.1
understand and apply the principle of superposition
14.2
understand the meaning of diffraction and the role of the wavelength
14.3
understand what is meant by interference
14.3
solve interference problems with two sources
14.3

draw the single slit diffraction pattern
14.4
calculate the angle of the first minimum of the single slit diffraction pattern
14.4
understand the effect of single slit diffraction of the two-slit interference pattern
14.4
explain qualitatively what happens when the number of slits increases
14.5
solve problems with the diffraction grating equation
14.5
REFLECTION
Can you describe a wave through wavefronts and rays? Do you know how to apply Snellâs law? Do you understand what is meant by superposition and do you know how to apply it? Do you understand what is meant by diffraction and interference? Do you understand the concept of path difference? Can you solve problems with two-slit interference?

Do you understand single slit diffraction? Can you describe the effect of slit width on the two slit interference pattern? Can you describe the effect of increasing the number of slits? Can you solve problems on the diffraction grating?
EXAM-STYLE QUESTIONS
You can find questions in the style of IB exams in the digital coursebook.