Physics Fsc Part 1 Chapter 9 Online Test With Answers

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Physics Fsc Part 1 Chapter 9 Online Test

Sr. # Questions Answers Choice
1 The centre of Newton's fringe is dark due to. Destructive interference Diffraction Constructive interference Polarization
2 Example of thin film is. Soap burble convex lens Concave lens Glass plate
3 In red light is used as compare to blue light then fringe spacing. Decreases Remain same Increases Becomes zero
4 In blue light is used as compare to red light then fringe spacing. Increase Decreases Remain same Becomes zero
5 The fringe spacing in a double slit experiment can be increased by decreasing. Wavelength of light Width of slits Slit separation Distance between the slits and the screen
6 Fringe spacing in Young's double slit experiment increases due to increase in. Slit separation Wave length Order of Fringe Frequency of source
7 Fringe spacing is inversely proportional to. Wave length Slit separation Distance between the slit and screen Frequency of light
8 Light entering rom air glass does not change in its. Frequency Wavelength Velocity Direction
9 Sodium chloride in a flame gives Green light White light Red light Yellow light
10 The blue colour of sky is due to diffraction Reflection Polarization Scattering
11 An oil film on water surface shows colour due to. Diffraction Interference Polarization Dispersion
12 The fringe spacing increases if we use. Yellow light Green lgiht Blue light Red light
13 According to Hygen's principle, each point on a wave front acts as a source of. Secondary wavelet New wave front Sound Primary wavelet
14 Hygen's principle is used for. Explain polarization Locate the wave front Find the speed of light Find the index of refraction
15 A ray of light shows the direction of propagation of light It is line which is. Normal to the wave front Parallax to the wave front Opposite to the wave front Equal to the wave front
16 the locus of all pint in the same wave of vibration is called. Wave front Diffraction Interference Polarization
17 In case of point source the shape of wave front is. Plane spherical Circular Eliptical
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