ASRJC Superposition Notes

ANDERSON SERANGOON JUNIOR COLLEGE PHYSICS 9749 10-1 Additional Notes Topic 12: Superposition Learning Outcomes: Candidates should be able to: A. Principle of superposition (a) explain and use the principle of super position in simple applications (b) show an understanding of the terms interference, coherence, phase difference and path difference B. Two-source interference (g) show an understanding of experiments which demonstrate two -source interference using water waves, sound waves, light waves and microwaves (h) show an understanding of the conditions required for two-source interference fringes to be observed (i) recall and solve problems using the equation 𝜆 = 𝑎𝑥/𝐷 for double-slit interference C. Single slit diffraction (e) explain the meaning of the term diffraction (f) show an understanding of experiments which demonstrate diffraction including the diffraction of water waves in a ripple tank with both a wide gap and a narrow gap (j) recall and use the equation sin 𝜃 = 𝜆/𝑏 to locate the position of the first minima for single slit diffraction (k) recall and use the Rayleigh criterion 𝜃 ≈ 𝜆/𝑏 for the resolving power of a single aperture D. Multiple slit diffraction – diffraction grating (l) recall and use the equation 𝑑 sin𝜃 = 𝑛𝜆 to locate the positions of the principal maxima produced by a diffraction grating (m) describe the use of a diffraction grating to determine the wavelength of light (the structure and use of a spectrometer are not required) E. Stationary waves (c) show an understanding of experiments which demonstrate stationary waves using microwaves, stretched strings and air columns (d) explain the formation of a stationary wave using a graphical method, and identify nodes and antinodes Suggested Lecture Plan Lect Concepts Qns Est. Video Time 1 A, B.1, B.2 CYU 1 40 min 2 B.3, B.4, C.1 Eg 1, Eg 2, Eg 3 42 min 3 C.2, C.3, C.4 Eg 4, Eg 5 42 min 4 C.5, D.1, D.2, E.1, E.2 Eg 6, Eg 7, Eg 8 36 min 5 E.3, E.4, E.5, E.6.1, E.6.2 CYU 2, Eg 9, Eg 10 38 min 6 E.6.3, E.6.4, E.6.5 Eg 11, Eg 12 46 min

ANDERSON SERANGOON JUNIOR COLLEGE PHYSICS 9749 10-2 Additional Notes Wave Nature of Wave Properties of Waves Behaviour of Wave Periodic Motion Disturbance through Space and Time Transfer Energy Not Matter Most Wave Types require Material Medium for Propagation, except EM Waves which can propagate in a vacuum as well as in a material medium. Transverse and Longitudinal Waves Wave speed Frequency Wavelength Amplitude Transverse Wave Crest & Trough Longitudinal Wave Rarefaction & Compression Superposition Single Slit Diffraction Stationary Waves Two-Source Interference Multiple Slit Diffraction

ANDERSON SERANGOON JUNIOR COLLEGE PHYSICS 9749 10-3 Additional Notes In this topic we are concerned with the interaction between two or more waves.