Light that has wavelengths of 462 nm in the air, 347 nm in the water, and 304 nm
ID: 1496846 • Letter: L
Question
Light that has wavelengths of 462 nm in the air, 347 nm in the water, and 304 nm in the glass is incident normally upon a thin film of water from above (from the air). Calculate the minimum, non-zero thickness (in nm) of the water film that will give a transmission maximum .
air n = 1.00
water n=1.33
glass n = 1.52
Also,
The phase shift uponreflection off the water is ___ rad.
The phase shift uponreflection off the glass is ___ rad.
A transmission maximum gives a reflection ____________________.
Explanation / Answer
for maximum transmission
2nwt = m x wavelength in air
2x1.33xt = 1x 462nm
t = 173.684 nm
The phase shift uponreflection off the water is 3.14 rad.
The phase shift uponreflection off the glass is 3.14 rad.
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