- #1
PeachBanana
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Homework Statement
A shallowly curved piece of glass
is placed on a flat one. When
viewed from above, concentric
circles appear that are called
Newton’s rings. In order to see
bright rings, the gap can be:
1. 0
2. 1/4λ
3. 1/2λ
4. λ
Homework Equations
1/2 λ occurs when n2>n1
The Attempt at a Solution
Why isn't the answer 1/2λ? For ray 1, when air travels into glass there is a 180° phase change. When glass travels back into air, there is no phase change. For Ray 2, it looks like air travels into air (although through glass) back into air so I didn't think there would be a phase change for that.