a) What minimum path difference is needed to introduce a phaseshift of 180 degre

Question

a) What minimum path difference is needed to introduce a phaseshift of 180 degrees. in light of wavelength 590 nm? b) What phase shift will that path difference introduce inlight of wavelength 830 nm? Answer in units of degrees. I got the answer for part a. I need help with part b. Thankyou!!!! a) What minimum path difference is needed to introduce a phaseshift of 180 degrees. in light of wavelength 590 nm? b) What phase shift will that path difference introduce inlight of wavelength 830 nm? Answer in units of degrees. I got the answer for part a. I need help with part b. Thankyou!!!!

Explanation / Answer

a)we know that = (2/) * d * sin is the phase difference between the two waves is the wavelength of light d * sin is the path difference or d * sin = (/2) * = 590 nm = 590 * 10-9 m and =180o = radian or d * sin = (590 * 10-9/2) * =295 * 10-9 m b)the phase shift introduced by the light ofwavelength = 830 nm is = (2/) * d * sin or = (2/830 * 10-9) * 295 *10-9 = 0.71 radian

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