A thin slice is cut out of a glass cylinder along a plane parallel to its axis. The slice is placed on a flat glass plate as shown in Figure. The observed interference fringes from this combination shall be A. straightB. circularC. equally spacedD. having fringe spacing which increases as we go outward

A thin slice is cut out of a glass cylinder along a plane parallel to

1.	A thin slice is cut out of a glass cylinder along a plane parallel to its axis. The slice is placed on a flat glass plate as shown in Figure. The observed interference fringes from this combination shall be A. straightB. circularC. equally spacedD. having fringe spacing which increases as we go outward
Answer» Correct Answer - a Locus of equal thickness are lines running parallel to the axis of the cylineder. Hence straight fringe will be observed.

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Angular width of central maxima in the Fraunhofer diffraction pattern of a slit is measured. The slit is illuminated by light of wavelength `6000Å`. When the slit is illuminated by light of another wavelength, the angular width decreases by 30%. The wavelength of this light will beA. `3500 Å`B. `4200 Å`C. `4700 Å`D. `6000 Å`
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