Welcome to your Superposition of Waves(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. A diffraction grating with N lines per metre is used to deflect light of various wavelengths λ. The diagram shows a relation between the deflection angles of θ for different values of λ in the nth order interference pattern.What is the gradient of the graph?Nnn/N1/NmN/n2. If two waves are in phase and have the same amplitude then resultant wave hassame amplitude as single wavetwice of amplitude of single wavehalf of amplitude of single wavethrice of amplitude of single wave3. If two sound waves having a phase difference of 60°, then they will have a path difference of _____ʎ/6ʎ3ʎʎ/34. A taunt wire is clamped at two points 1.0m apart. It plucked near one end. Which are the three longest wavelength present on the vibrating wire?2.0 m, 1.0 m and 0.50 m2.0 m, 1.0 m and 0.67 m1.0 m, 0.67 m and 0.50 m1.0 m, 0.50 m and 0,25 m5. Two waves with phase difference 180° have resultant of amplitudedoubles the single wavesame as the single waveonezero6. With diffraction grating, the angles aregreatersmallclose to zerozero7. When two waves meet up, their displacementssubtract downcancel outdestruct each otherad up8. A wave is diffracted as it passes through an opening in a barrier.The amount of diffraction that the wave undergoes depends on both thewavelength of the incident wave and the size of the opening.amplitude of the incident wave and the size of the openingwavelength and speed of the incident wave.amplitude and frequency of the incident wave.9. Fringes are referred to asnormal pointsminimanodesmaxima10. Principle of superposition can be applied toEM wavesall of the abovesound wavesradio waves11. The mercury spectrum contains two intense yellow lines with wavelengths of 577.0 nm and 579.1 nm respectively. Light from a mercury lamp is incident normally on a diffraction grating ruled with 4300 lines per centimetre. To distinguish the two yellow lines clearly, it is desirable that there should be an angular separation of at least 0.30° between the two lines. Which order of diffraction can be used?4 th order2 nd order5 th order3 rd order12. Constructive interference happens when two waves areout of phasezero amplitudein phasein front13. Visible of light has a wavelength of3 e8 m5 e-7 m6 e3 m4 e4 m14. Wavelength of an incident light when it is incident normally on a diffraction grating having 3000 lines per centimeter angular separation is 10° is500 nm580 nm650 nm600 nm15. In young double slit experiment, the wavelength of incident beams should beoppositesamezerodifferent16. Travelling waves of wavelength 20 cm are created in the air columns in a closed pipe P and an open pipe Q. The lengths of the pipes are shown.In which pipe or pipes are stationary waves formedP onlyneither P nor QQ onlyP and Q17. For destructive interference, the path difference iseven whole number of wavelengthwhole number of wavelengthsodd number of half wavelengthseven number of half wavelengths18. A speaker producing sound of frequency 2500 Hz is placed at the open end of a closed pipe containing a gas.As the piston is moved along the pipe, a series of 6 loud sounds was heard. The first loud sound was observed when the piston was 4.0 cm away from the open end, and the sixth loud sound was observed when the piston was 37 cm away from the open end. What is the speed of sound in the gas?330 m/s370 m/s400 m/s270 m/s19. The diagram shows a standing wave on a string. The standing wave has three nodes N1, N2 and N3.Which statement is correct?All points on the string vibrate with the same amplitude.Points equidistant from N2 vibrate with the same frequency and in phase.Points equidistant from N2 vibrate with the same frequency and the same amplitude.All points on the string vibrate in phase.20. The diagram shows a string with with ends P and T fixed. The string is made to vibrate transversely so that P, R and T are the only points on the string which are nodesThe vibrations of the two points Q and S, shown on the string, havedifferent amplitudes and are in phasethe same amplitude and differ in phase by 90°the same amplitude and are in phasethe same amplitude and differ in phase by 180°21. A suspension bridge is to be built across a valley where it is known that the wind can gust at 5 second interval. It is estimated that speed of transverse waves along the span of the bridge would be 400 m/s. The danger of resonant motion in the bridge at its fundamental frequency would be the greatest if the span had a length of80 m2000 m1000 m400 m22. Interference pattern of light and dark bands on screen is calledline spectrumlight spectrumfringesgraphical pattern23. From double slit experiment, the quantities to be measured areslit separationslit-to-screen distancefringe separationall of the above24. Which of the following is always true for a stationary wave?All particles vibrate in simple harmonic motion with the same frequency as the waveThe particles in the wave oscillate perpendicularly to the direction of wave travelAll particles have the same amplitude.No energy is transferred from one end of the wave to the other.25. For a wave propagating in a medium, identify the property that is independent of the others.WavelengthsFrequencyVelocityAll these depend on each other26 out of 25Time is Up!