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
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
Question ID - 150030 | SaraNextGen Top Answer
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
|
A thin film of soap solution |
|||||||
|
a) |
420 nm |
b) |
450 nm |
c) |
630 nm |
d) |
1260 nm |
1 Answer
127 votes
Answer Key / Explanation : (b) -
|
(b)
Or If Therefore, thickness of soap solution is given by
Or |
then 
127 votes
Answer Link
127