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TFM
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Homework Statement
A microwave detector is located 0.5m above the surface of a large lake far from the shore. As a star, emitting monochromatic microwave radiation of 21cm wavelength, rises slowly above the horizon, the detector indicates successive maxima and minima in the signal intensity. At what angle above the horizon is the star when the first maximum is received?
Homework Equations
Not sure of relevance:
Youngs:
[tex] I(s) = I_0 cos^2 \frac{kDs}{2} [/tex]
Infinite Grating:
[tex] I(s) = I_0 \sum^\{infty}_{n = -\infty}\sigma (s-\frac{n\lambda}{d}) [/tex]
The Attempt at a Solution
I am slightly unsure about this question. My main problem is that I am unsure where the diffraction is coming from? Any help would be most appreciated.
Included is a diagram of my interpretation of the situation
Thanks in advance,
TFM