Last Updated On 16-03-2023 - By Jeesha Sara
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 :-
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 |
|
(b)
Or If Therefore, thickness of soap solution is given by
Or |
then 
Next Question :
|
What is the minimum thickness of a thin film required for constructive interference in the reflected light from it? Given, the refractive index of the film = 1.5, wavelength of the light incident on the film = 600 nm |
|||||||
|
a) |
100 nm |
b) |
300nm |
c) |
50 nm |
d) |
200 nm |
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