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25 Dec 2021
Given information
Refractive index of upper layer of oil 
Refractive index of lower layer of water 
Thickness of oil layer is varying.
Step-by-step explanation
Step 1.
For the formation of dark fringe ( destructive interference ) path difference should be equal to 
where 
is wavelength of light. If thickness is zero , phase difference
takes place when ray of light is reflected from a medium of higher refractive index.
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Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922
Solutions
Chapter
Section
- Problem 1
- Problem 2
- Problem 3
- Problem 4
- Problem 5
- Problem 6
- Problem 7
- Problem 8
- Problem 9
- Problem 10
- Problem 11
- Problem 12
- Problem 13
- Problem 14
- Problem 15
- Problem 16
- Problem 17
- Problem 18
- Problem 19
- Problem 20
- Problem 21
- Problem 22
- Problem 23
- Problem 24
- Problem 25
- Problem 26a
- Problem 26b
- Problem 26c
- Problem 27a
- Problem 27b
- Problem 28
- Problem 29
- Problem 30a
- Problem 30b
- Problem 31
- Problem 32
- Problem 33
- Problem 34
- Problem 35
- Problem 36
- Problem 37
- Problem 38
- Problem 39
- Problem 40
- Problem 41
- Problem 42
- Problem 43
- Problem 44
- Problem 45
- Problem 46a
- Problem 46b
- Problem 46c
- Problem 47
- Problem 48a
- Problem 48b
- Problem 49
- Problem 50
- Problem 51
- Problem 52
- Problem 53
- Problem 54
- Problem 55
- Problem 56
- Problem 57
- Problem 58
- Problem 59
- Problem 60
- Problem 61
- Problem 62a
- Problem 62b
- Problem 63
- Problem 64
- Problem 65
- Problem 66
- Problem 67
- Problem 68
- Problem 69
- Problem 70
- Problem 71
- Problem 72a
- Problem 72b
- Problem 72c