The path difference between two wave fronts emitted by two coherent sources of wavelength 6280 {A}^{\circ} is 2.5 micron. The phase difference between the wave fronts in radian is :

Auxiliary Nurse Midwife Exam 2019 Solved Paper

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The path difference between two wave fronts emitted by two coherent sources of wavelength 6280A∘ is 2.5 micron. The phase difference between the wave fronts in radian is :

25 radian
2.5π radian
20 radian
25π radian

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