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Interference- physics

Hi I was wondering if soemone would be bale to help me with this question please.

All i have so far is:
path difference=(m+1/2) x wavelength
Capture.PNG
(edited 3 years ago)
Reply 1
Original post by wonder girl
Hi I was wondering if soemone would be bale to help me with this question please.

All i have so far is:
path difference=(m+1/2) x wavelength
Capture.PNG

L2T is shorter than the other distance L1T by half of one wavelength ie 20 so answer is D
Original post by swinroy
L2T is shorter than the other distance L1T by half of one wavelength ie 20 so answer is D

Oh okay thank u!

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