PHY 101 ch 29 quiz
An ideal Polaroid will transmit 50% of unpolarized light incident on it. How much light is transmitted by two ideal Polaroids that are oriented with their axes parallel to each other?
50%
The vibrational direction of the electron and the plane of polarization of the light it emits
are the same
The polarization axes of glasses for 3-D viewing are
at right angles to each other
According to Huygens' principle, every point on a wave
behaves as a source of new waves
If the path-length difference between two identical and coherent beams is two wavelengths when they arrive on a screen, will they produce a dark or a bright spot?
bright spot
When the reflected path from one surface of a thin film is one-half wavelength different in length from the reflected path from the other surface and no phase change occurs, will the result be destructive interference or constructive interference?
destructive interference
Consider plane waves incident upon a barrier with a small opening. After passing through the opening, the waves
fan out
For radio reception, diffraction is
helpful
To perceive greater detail a dolphin emits sounds of
higher frequency
The glare seen from water is largely
horizontally polarized
A diffraction grating separates light into its component colors by the process of
interference
Colors seen when gasoline forms a thin film on water are a demonstration of
interference
The iridescent colors seen in thin films are the result of
interference
Interference colors in a soap bubble give evidence that the soap film
is thin and has two reflecting surfaces
Which will produce more widely spaced fringes of light when passed through a diffraction grating - light from a red laser or light from a green laser?
light from a red laser
Interference is a property of
light, water, and sound waves
Waves diffract the most when their wavelength is
long
Part complete Waves spread when passing through openings of various sizes. More spreading occurs for openings that are
narrow
A thin film appears blue when illuminated with white light. The color being cancelled by destructive interference is
not green, blue, red, or white
Huygens' principle features wavefronts that are composed of
overlapping waves
A glass prism separates light into its component colors by the process of
refraction
Consider the interference colors seen in a film of gasoline on a wet street. The function of the water is to provide a
second reflecting surface
The polarization axes of ordinary sunglasses are
vertical
To remove the glare of light from a polished floor, should the axis of a Polaroid filter be horizontal or vertical?
vertical
Light illuminates two closely spaced thin slits and produces an interference pattern on a screen behind. For which color of light - yellow or green - will the distance between the fringes be greater?
yellow
