True or False: When light comes from two POINT sources, constructive interferenc

Question

True or False: When light comes from two POINT sources, constructive interference occurs at locations where the path length of light from each source is an integral number of wavelengths.
True or False: When light comes from two COHERENT POINT sources, constructive interference occurs at locations where the path length of light from each source is an integral nubmer of wavelengths.
True or False: When light comes from two coherent point sources, constructive interference occurs at locations where the difference in paths lengths of the light from each source is an integral number of wavelengths
Tue or False: When light comes from two coherent point sources that are in phase, constructive interference occurs at locations where the difference in path lengths of the light from each source is an integral number of wavelengths.
True of False: For a given line spacing, a large diffraction grating is capable of better spectral resolutions.

Explanation / Answer

False: When light comes from two POINT sources, constructive interference occurs at locations where the path length of light from each source is an integral number of wavelengths. False: When light comes from two COHERENT POINT sources, constructive interference occurs at locations where the path length of light from each source is an integral nubmer of wavelengths. False: When light comes from two coherent point sources, constructive interference occurs at locations where the difference in paths lengths of the light from each source is an integral number of wavelengths True : When light comes from two coherent point sources that are in phase, constructive interference occurs at locations where the difference in path lengths of the light from each source is an integral number of wavelengths. True: For a given line spacing, a large diffraction grating is capable of better spectral resolutions.

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