PPSC Physics Chapter 5 Waves and Wave Properties of Light With Answers

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PPSC Physics Chapter 5 Waves and Wave Properties of Light

Sr. # Questions Answers Choice
1 In a diffraction pattern, the width of any fringe Is directly proportional to slit width Is inversely proportional to slit with Has no dependence on slit width Is zero
2 The same notes being played on sitar and veena differ in. Pitch Quality Both quality and pitch Neither quality nor pitch
3 A body travels with a speed greater than the speed of sound What would be the wave front shape. Ellipitical Spherical Conical Parabolical
4 Two sources of sound are said to be in resonance when. They look like similar They produce sound of same frequency They are enacted by the same agent They differ from each other
5 The sound velocity in moist air as compared to dry air will be More Less Same zero
6 Which of the following properties of sound is affected by change in air temperature. Amplitude Intensity Frequency Wavelength
7 When two identical waves are superimposed the velocity of the reasultant wave. Increases Decreases Become zero Remain unchanged
8 Which of the following represents an elastic wave. Light waves Radiowaves X-rays Sound waves
9 On which parameter the path difference between two interfering waves depends upon. Amplitude Pitch Intensity Phase angle
10 Plane polarized light can be produce dby Simple reflection Double refrraction Scattering of light All of these
11 Intensity of the dark bands in interference pattern becomes zero when two waves. Of light are monochromatic Are of the same frequency Are of the same amplitude Travel in opposite direction
12 Air bubble in water shines because of Reflection Refraction Diffraction Total internal reflection
13 The light rays which combine destructively would mean that resultant Intensity increases Intensity decreases Amplitude increases Amplitude decreases
14 The shape of wave front depends on Density of medium Shape of medium Viscosity of medium Length of medium
15 Which of the following is nearly monochromatic Light from sodium lamp Light from candle Light from gas lamp Light from sun
16 Huygen's principle is used to explain the Speed of light Dispersion of light Propagation of light Reflection of light
17 interference and diffraction of light support the Wave nature of light Transverse nature of light waves Quantum nature of light Electromagnetic nature of light
18 On reflection of light from a source there occurs a change in Wavelength Velocity Period Frequency
19 Palaroids can be used To control headlight glare in right driving To determine the concentration of the optically active substances In curtain less windows to adjust the amount of light all of the above
20 The central ring is bright in case of Newton's rigs produced by Reflection Wedges Refraction Transmission
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