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9th Chapter

## First Year Physics Chapter 9 Online MCQ Test for 1st Year Physics Chapter 9 (Physical Optics)

This online test contains MCQs about following topics:

Wave Fronts - Huygen's principle - Interferance of Light Waves - Young's Double slit Experiment - Interference in Thin Films - Newton's Rings - Michelson's Interferometer - Diffraction of Light - Diffraction due to a Narrow slit - Diffraction Grating - Diffraction of X-Rays by Crystals - Polarization

#### FSC Part 1 Physics Ch. 9 Test

Start Physics Ch. 9 Test

### First Year Physics Chapter 9 Online MCQ Test for 1st Year Physics Chapter 9 (Physical Optics)

1 The fringe spacing increases if we use.
• A. Yellow light
• B. Green lgiht
• C. Blue light
• D. Red light
2 When newton ring are seen through the transmitted light, then central spot is.
• A. Dark
• B. Blue
• C. Bright
• D. Red
3 Oil film floating on water exhibits colours due to
• A. Interference
• B. Diffraction
• C. Polarization
• D. All of these
4 The light energy travels in space as waves was firstly proposed by
• A. Maxwell
• B. Young
• C. Einsten
• D. Hydrogen
5 Intensity of light depend on
• A. Wave length
• B. Amplitude
• C. Velocity
• D. Frequency
6 Bright fringes are also called as
• A. Minima
• B. Maxima
• C. Wave front
• D. Ray of light
7 In red light is used as compare to blue light then fringe spacing.
• A. Decreases
• B. Remain same
• C. Increases
• D. Becomes zero
8 Which is nooptically active
• A. Sugar
• B. Tartaric acid
• C. Water
• D. Sodium chloride
9 The fringe spacing in a double slit experiment can be increased by decreasing.
• A. Wavelength of light
• B. Width of slits
• C. Slit separation
• D. Distance between the slits and the screen
10 The process of confining the beam of light to vibrate in one plane is called.
• A. Interference
• B. Diffraction
• C. Polarization
• D. Total internal refraction

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