Physics Principles and Problems 2009

Section 19.1 : Interference

Self-Check Quizzes

1
What causes the dark areas between the bright bands in the double-slit experiments using monochromatic light?

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A)incoherent wave fronts
B)constructive interference
C)coherent wave fronts
D)destructive interference
2
Why does light passing through a narrow slit have nearly cylindrical wave fronts?
A)The slit is very small.
B)The light source is monochromatic.
C)The light is diffracted by the slit.
D)The light is coherent.
3
What does Young's double-wave experiment makes use of to measure wavelength?
A)constructive interference
B)total internal reflection
C)incoherent light
D)interference fringes
4
What determines the color that is enhanced by reflection in a thin film?
A)incident angle
B)film thickness
C)destructive interference
D)intensity of incident light
5
Find the wavelength of light from a double-slit experiment, where d = 1.00 × 10–5 m, x = 2.20 × 10–2 m, and L = 0.500 m.
A)λ = 1.10 × 10–7 m
B)λ = 4.44 × 10–7 m
C)λ = 4.44 nm
D)λ = 110 nm
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