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Daaniyaal
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Homework Statement
13. A man standing by the shore observes sea waves approaching at a frequency of 0.20Hz. A man on a boat observes that waves are approaching the boat at a frequency of 0.50Hz. The speed of the waves is 2.0ms–1. Which of the following gives a possible value for the speed of the boat and its direction?
A) 3.0 ms^-1 away from the shore
B) 3.0 ms^-1 towards the shore
C) 1.2 ms^-1 away from the shore
D) 1.2 ms^-1 towards the shore
Homework Equations
f′= f[v/(v±u)]
f′= f[(v±u)/v]
The Attempt at a Solution
I tried to use the moving observer formula and moving source formula but neither worked :(
Wave Phenomena:
A parallel beam of light with a wavelength 600 nm passes through a single narrow slit and forms a diffraction pattern on a screen. The angle at which the first diffraction minimum is formed is 2.0 × 10–3 rad.
What would be the angle of the first diffraction minimum for light of wavelength 400 nm?
A. 3.0 × 10–3 rad
B. 2.0 × 10–3 rad
C. 1.3 × 10–3 rad
D. 1.2 × 10–3 rad
I don't know which formulas pertain to these, I would love some resources on this subject too, thank you!