Physics Principles and Problems 2009

Section 19.2 : Diffraction

Self-Check Quizzes

1
If the same size slit is used, what color light would have the widest central band in a single-slit diffraction pattern?
A)blue
B)violet
C)red
D)yellow
2
What is a device that uses a many single slits that diffract light?
A)diffraction grating
B)double-slit device
C)prism
D)DVD burner
3
The measurements from a grating spectroscope are made more precise by _____.
A)an increase in the intensity of the source light
B)an increase concentration of slits in the grating
C)use of a medium with a smaller index of refraction
D)increasing the value of θ
4
Why is it sometimes difficult with stars that are close together to tell whether there are one or two stars when viewed through a telescope?
A)because of diffraction
B)because of constructive interference
C)because of the presence of dark rings
D)because the images are inverted
5
What is the human eye's resolution limited by?
A)diffraction
B)the spacing of the cones
C)Rayleigh criterion
D)imperfection in the lens and the fluid that fills the eye
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