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Suggested activity: Carry out activities of diffraction of plane water waves by changing: width of the gap wavelength 5.5.3 Draw diagrams to show the pattern of diffraction of water waves and the effect of diffraction of light waves. Suggested activity: Draw a diagram to show the pattern of diffraction of plane water waves for different widths of gap and different wavelengths.
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KSSM PHYSICS FORM 4 94 CONTENT STANDARD LEARNING STANDARD NOTES Carry out an activity with red laser light (λ= 700 nm) to observe and draw the effects of diffraction through a single slit and a pin hole. 5.5.4 Explain the applications of diffraction of waves in daily life. Suggested activity: Gather information and discuss situations on diffraction of water waves, light waves and sound waves in daily life. 5.6 Interference of Waves Pupils are able to: 5.6.1 Explain the principle of superposition of waves. Suggested activity: Investigate superposition of waves using computer simulations/ transparency slides. Carry out activities to show the interference of waves with two coherent sources of waves for: water waves light waves sound waves using an Audio Generator Kit. Discuss constructive (antinode) and destructive (node) interference using the superposition principle. Note: Two waves sources are coherent when: both waves have the same frequency their phase difference is constant
KSSM PHYSICS FORM 4 95 CONTENT STANDARD LEARNING STANDARD NOTES 5.6.2 Describe the pattern of interference for: (i) water waves (ii) sound waves (iii) light waves Suggested activity: Draw the pattern of interference of waves for different distance of separation of slits / sources and for different wavelengths. 5.6.3 Relate , a, x and D for the wave interference pattern. Suggested activity: Carry out activites to investigate the relationship between , a, x and D for the wave interference pattern of: Water waves Sound waves Light waves (Young’s double-slit experiment) Introduce 5.6.4 Solve problems involving interference of waves. Note: Formula:5.6.5 Communicate on the applications of interference of waves in daily life. Suggested activity: Gather information on the applications of interference of waves in daily life. DaxλDaxλ
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KSSM PHYSICS FORM 4 96 CONTENT STANDARD LEARNING STANDARD NOTES For example : non-reflective glasses, design of theater hall involving seating arrangement and other related examples. 5.7 Electromagnetic Waves Pupils are able to: 5.7.1 Characterise electromagnetic waves Suggested activity: Gather information on the properties of electromagnetic waves. Note: Electromagnetic waves are formed from magnetic and electric fields oscillating perpendicularly to each other. 5.7.2 State the components of the electromagnetic spectrum according to wavelengths and frequencies.
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