The phenomena where two light waves combine and produce regions of reinforcement

Question

The phenomena where two light waves combine and produce regions of reinforcement and regions of cancellation is known as _____ The correct explanation for the regions of cancellation is that neither wave contained any energy. neither wave contained any momentum. the two waves were a half-wavelength out of phase. the two waves were in-phase. Light of 500 nm wavelength is reflected from a thin film of air between two glass plates. The thickness of the film is 1 mu m (1000 nm). a. How much farther does the light reflected from the bottom surface travel than the light reflected from the top of the film (assuming near normal incidence)? b. How many wavelength of light does this represent (show calculation) Light of 500 nm is incident upon a double slit with a separation of d = 0.4 mm (4 times 10^-4m). A screen located x = 2.0 m from the double slit. At what distance y from the center will the first dark fringe beyond the center fringe appear? When a beam of light passes through a narrow slit we can observe some light in the "geometrical" shadow of the slit. This light arrived by the process of reflection. refraction diffraction interference. A common use of a diffraction grating is to split light in to different polarizations. separate light into its separate wavelengths. reflect light into a different direction. focus light onto the retina. The polarization of a light wave is determined by the direction of the light's velocity. perpendicular to both the electric and magnetic field. of the oscillating electric field. of the fluorescent tube used as a light source. Maxwell found that the speed of propagation for an electromagnetic wave can be calculated from the equation v = Squareroot (k/k'), where k is the coulomb's const (9 times 10 degree Nm^2/C^2) and the k' the magnetic field const (1 times 10-7 N/A^2). What is the speed of propagation for an electromagnetic wave? What can you conclude from the fact that the speed of propagation for an electromagnetic wave equals that of the speed of light about the relationship between light and electromagnetic waves? Explain

Explanation / Answer

9. Option c is correct. The phenomenon is called destructive interference. When two wave with same Wavelength, and with a path difference of half a Wavelength cross path or interfere, then the crest of one wave coincides with the trough of the other wave, the resultant is the cancellation of one another therefore the region of cancellation forms.

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