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1) Two sine waves have equal peak to peak amplitudes 89 but are out of phase by 180 degrees. What is the peak to peak amplitude of the resultant wave.

2)Two sine waves have equal peak to peak amplitudes 81 but are out of phase by 90 degrees. What is the peak to peak amplitude of the resultant wave.

3) Light from a single source goes from O to X via two paths: directly OX, path length 10.29600 mm and indirectly OYX, path length 10.29765 mm. The wavelength is 660 nm. What is the phase difference between the two waves when they meet at X.

2)Two sine waves have equal peak to peak amplitudes 81 but are out of phase by 90 degrees. What is the peak to peak amplitude of the resultant wave.

3) Light from a single source goes from O to X via two paths: directly OX, path length 10.29600 mm and indirectly OYX, path length 10.29765 mm. The wavelength is 660 nm. What is the phase difference between the two waves when they meet at X.

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