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The optical path difference between two waves starting from coherent sources arriving at a point on the screen is 80.5 wavelengths. Is the point dark or bright? If the path difference is 48 x 10 m calculate the wavelength of light used. (Oct. '91)

The optical path difference between two waves starting from coherent sources arriving at a point on the screen is 80.5 wavelengths. Is the point dark or bright? If the path difference is 48 x 10 m calculate the wavelength of light used. (Oct. '91)

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The optical path difference between two waves starting from coherent sources arriving at a point on the screen is 80.5 wavelengths. Is the point dark or bright? If the path difference is 48 × 10 m calculate the wavelength of light used. (Oct. '91)
Transcribed Image Text:The optical path difference between two waves starting from coherent sources arriving at a point on the screen is 80.5 wavelengths. Is the point dark or bright? If the path difference is 48 × 10 m calculate the wavelength of light used. (Oct. '91)
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