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What do the bright and dark bands you see in a photograph of a four-slit interference pattern represent? The image of the sources of light that these slits represent. 2.The respective positions of bright and dark particles of light. 3.The respective positions of the crests and the troughs of the light wave. 4.An interference pattern that is not present unless it is produced by the camera lens. 5.The respective positions of constructive and destructive interference of light from the four sources.

In an interference pattern, the wavelength and frequency are _____ unchanged in regions of destructive interference but smaller in regions of constructive interference. 2.unchanged in regions of destructive interference but greater in regions of constructive interference. 3.the same in both the regions of constructive interference and the regions of destructive interference. 4.greater in regions of constructive interference than in regions of destructive interference. 5.smaller in regions of constructive interference than in regions of destructive interference.

When a central dark fringe is observed in reflection in a circular interference pattern, what is the phase difference (in radians) of the waves reflected from the upper and lower surfaces of the medium?

no evidence of interference between the barrier and the screen. 2.evidence of interference everywhere between the barrier and the screen.

In a two-slit interference pattern projected on a screen, the fringes are equally spaced on the screen _____ everywhere. 2.only for large angles. 3.only for small angles.

Which of the following will cause the fringes in a two-slit interference pattern to move farther apart? decreasing the wavelength of the light 2.decreasing the screen distance L 3.decreasing the slit spacing d 4.immersing the entire apparatus in water.

At dark areas in an interference pattern, the light waves have canceled. Thus, there is zero intensity at these regions and, therefore, no energy is arriving. Consequently, when light waves interfere and form an interference pattern, _____ energy conservation is violated because energy disappears in the dark areas 2.energy transferred by the light is transformed to another type of energy in the dark areas 3.the total energy leaving the slits is distributed among light and dark areas and energy is conserved

In a laboratory accident, you spill two liquids onto water, neither of which mixes with the water. They both form thin films on the water surface. When the films become very thin as they spread, you observe that one film becomes bright and the other dark in reflected light. The film that is dark _____ has an index of refraction higher than that of water. 2.has an index of refraction lower than that of water. 3.has an index of refraction equal to that of water. 4.has an index of refraction lower than that of the bright film.

One microscope slide is placed on top of another with their left edges in contact and a human hair under the right edge of the upper slide. As a result, a wedge of air exists between the slides. An interference pattern results when monochromatic light is incident on the wedge. At the left edges of the slides, there is _____ a dark fringe. 2.a bright fringe. 3.impossible to determine.