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At the first minimum adjacent to the central maximum of a single-slit diffraction pattern, the phase difference between the Huygen's wavelet from the edge of the slit and the wavelet from the midpoint of the slit is:
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Important Questions on Wave Optics
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The two slits in Young's experiment have widths in a ratio . The ratio of light intensity at the maxima and minima in the interference pattern is . Find .
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The width of central fringe of a diffraction pattern is on a screen at a distance of . If light source has wavelength , then the slit width is,
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The interference pattern shifts downward by when a polystyrene sheet of refractive index is placed in front of the lower slit. If wavelength used is , the separation between slits is and separation between slits and screen is , then thickness of sheet is,
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The reflected ray is completely polarized when a ray is incident at a medium of refractive index 1.73, then the value of angle of refraction ?
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If the intensity of central fringe in interference pattern is , then find intensity at a point having path difference on a screen from the centre (in ).
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In a diffraction pattern due to a single slit of width the first minimum is observed at an angle when light of wavelength is incident on the slit. The first secondary maximum is observed at an angle of:
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The intensity at the maximum in a Young’s double- slit experiment is . Distance between two slits is , where is the wavelength of light used in the experiment. What will be the intensity in front of one of the slits on the screen placed at a distance ?
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The interference pattern is obtained with two coherent light sources of intensity ratio . In the interference pattern, the ratio $\frac{I_{\max }-I_{\min }}{I_{\max }+I_{\min }}$ will be
