On a screen behind such a diffracting grating, narrow, bright fringes can be seen. After that, the entire research is submerged in water. Do the screen's fringes get closer together, farther apart, stay the same, or simply disappear? Explain
The fringes move away from each other.
The diffraction experiment having interference pattern fringes is described by
The experiment is assumed to mean having emptied the air in this equation.
When the identical comparison is made in water, the wavelength changes.
execution for constructive interference.
The spectral separation is amplified by the same wavelength because water has an index of refraction of , so the fringe moves away from one another.
Optical computers require microscopic optical switches to turn signals on and off. One device for doing so, which can be implemented in an integrated circuit, is the Mach-Zender interferometer seen in FIGURE. Light from an on-chip infrared laser is split into two waves that travel equal distances around the arms of the interferometer. One arm passes through an electro-optic crystal, a transparent material that can change its index of refraction in response to an applied voltage. Suppose both arms are exactly the same length and the crystal’s index of refraction with no applied voltage is.
a. With no voltage applied, is the output bright (switch closed, optical signal passing through) or dark (switch open, no signal)? Explain.
b. What is the first index of refraction of the electro-optic crystal larger than that changes the optical switch to the state opposite the state you found in part a?
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