A Michelson interferometer uses red light with a wavelength of from a hydrogen discharge lamp. How many bright-dark-bright fringe shifts are observed if mirror is moved exactly ?
Number of Bright-Dark-fringes shifts,
A hydrogen lamp features a glass lamp enclosure with a radiation-emitting window that receives a body manufactures from a zirconium-cobalt alloy that forms a part of a hydride that is a reservoir for hydrogen or deuterium and allows controlled hydrogen or deuterium liberation from the reservoir.
The number of passing fringes is calculated as follows:
In our numerical example, we have
Light of wavelength passes though two slits separated by and is observed on a screen behind the slits. The location of the central maximum is marked on the screen and labeled
a. At what distance, on either side of , are the bright fringes?
b. A very thin piece of glass is then placed in one slit. Because light travels slower in glass than in air, the wave passing through the glass is delayed by in comparison to the wave going through the other slit. What fraction of the period of the light wave is this delay?
c. With the glass in place, what is the phase difference between the two waves as they leave the slits?
d. The glass causes the interference fringe pattern on the screen to shift sideways. Which way does the central maximum move (toward or away from the slit with the glass) and by how far?
A triple-slit experiment consists of three narrow slits, equally spaced by distance and illuminated by light of wavelength . Each slit alone produces intensity on the viewing screen at distance .
Consider a point on the distant viewing screen such that the path-length difference between any two adjacent slits is . What is the intensity at this point? What is the intensity at a point where the path-length difference between any two adjacent slits is ?
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