28/03/2020 Superposition of Waves(Senior Class Physics Study by Topics) 28/03/2020 0Comments by Gate Academy Welcome to your Superposition of Waves(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. Fringes are referred to as normal points maxima nodes minima 2. For destructive interference, the path difference is even number of half wavelengths whole number of wavelengths even whole number of wavelength odd number of half wavelengths 3. Splitting of white light in to constituent colors is called dispersion diffraction reflection refraction 4. A double-slit interference of green-coloured light was set up as shown and interference fringes are formed on the screen.Which change would increase the distance between adjacent fringes? Reduce the width of each slit. Move the double-slit closer to the screen. Use orange-coloured light. Use a double-slit where the slits are further apart. 5. 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? 1/Nm N/n n/N Nn 6. 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 of 1000 m 400 m 80 m 2000 m 7. 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, have the same amplitude and differ in phase by 180° different amplitudes and are in phase the same amplitude and are in phase the same amplitude and differ in phase by 90° 8. The superposition of two waves creates Compressions Higher frequencies Light Interference 9. A wire is stretched over two supports, Q and R, a distance 4x apart. Three light pieces of paper rest on the wireWhen the wire is made to vibrate at one particular frequency, the middle piece of paper stays on, but the others fall off the wire.The wavelength of the vibration produced on the wire? 3x 2x 8x 4x 10. The equation of wave is given byy=10sin(2πt/30+α)If the displacement is 5cm at t=0, then the total phase at t=7.5s will be ______ π/3rad 2π/5rad π/2rad 2π/3rad 11. If two waves are in phase and have the same amplitude then resultant wave has half of amplitude of single wave same amplitude as single wave twice of amplitude of single wave thrice of amplitude of single wave 12. Visible of light has a wavelength of 3 e8 m 5 e-7 m 6 e3 m 4 e4 m 13. Principle of superposition can be applied to EM waves sound waves all of the above radio waves 14. A double-slit interference experiment is set up as shown.Fringes are formed on the screen which is 40.0 cm away. The distance between the slits is 9.0 cmapart. The microwave source has a wavelength of 2.0 cm and intensity of I.What is the resultant intensity at X? 2l 4l zero l 15. A string is stretched under constant tension between fixed points X and Y. The solid lie in the diagram shows a standing (stationary) wave at an instant of greatest displacement. The broken line shows the other extreme displacement.Which one of the following statements is correct? At the moment shown, the energy of the standing wave has both kinetic energy and potential energy The string at P' and Q' will next move in opposite directions to one another other A short time later, the string at R will be displaced The distance between P and Q is one wavelength 16. A stationary wave is set up on a stretched string XY as shown.At which point(s) will the oscillation be exactly in phase with that at P? 2 only 1 and 2 only 3 only 1, 2 and 3 17. With diffraction grating, the angles are greater small zero close to zero 18. A boat at anchor is rocked by waves, whose crests are 100m apart and velocity is 25m/s. The boat bounces up once in every ____ 0.25s 75s 2500s 4s 19. Which of the following is always true for a stationary wave? The particles in the wave oscillate perpendicularly to the direction of wave travel No energy is transferred from one end of the wave to the other. All particles have the same amplitude. All particles vibrate in simple harmonic motion with the same frequency as the wave 20. Constructive interference happens when two waves are in front out of phase in phase zero amplitude 21. A transverse wave passes through a string with the equationy=10sinπ(0.02x-2t)Where x is in metres and t in seconds. What is the maximum velocity of the particles in wave motion? 121m/s 78m/s 63m/s 100m/s 22. A wave is diffracted as it passes through an opening in a barrier.The amount of diffraction that the wave undergoes depends on both the wavelength and speed of the incident wave. amplitude of the incident wave and the size of the opening amplitude and frequency of the incident wave. wavelength of the incident wave and the size of the opening. 23. The waves produced by a motor boat sailing in water are __________ Longitudinal and transverse Stationary Transverse Longitudinal 24. For listening radio in cars, external radio aerials are used because radio waves cannot pass through window radio waves have shorter wavelength radio waves require a medium to propagate radio waves have longer wavelength 25. Grating element is equal to nλ sinθ nλ/sinθ cosθ 1 out of 25 Time is Up! Time's up
