A thin film of soap solution lies on the top of a glass plate When visible light is incident almost normal to the plate, two adjacent reflection maxima are observed at two wavelengths 400 and 630 nm. The minimum thickness of the soap solution is |
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a) |
420 nm |
b) |
450 nm |
c) |
630 nm |
d) |
1260 nm |
A thin film of soap solution lies on the top of a glass plate When visible light is incident almost normal to the plate, two adjacent reflection maxima are observed at two wavelengths 400 and 630 nm. The minimum thickness of the soap solution is |
|||||||
a) |
420 nm |
b) |
450 nm |
c) |
630 nm |
d) |
1260 nm |
(b) Or If then Therefore, thickness of soap solution is given by Or |