- #1
nso09
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Homework Statement
Coherent electromagnetic radiation is sent through a slit of width 0.01 mm. For which of
the following wavelengths will there be no points in the diffraction pattern where the intensity is zero?
A. Blue light of wavelength ##\lambda=500 nm##
B. Infrared light of wavelength ##\lambda=10.6 μm##
C. Ultraviolet light of wavelength ##\lambda=50 nm.##
##d=.01mm##
Homework Equations
##dsin\theta=m\lambda##
##dsin\theta=(m+.5)\lambda##
The Attempt at a Solution
I'm not sure exactly what the question is asking. What does it mean diffraction pattern? Is it just talking about the central maximum or the rest of the pattern where there are maxima and minima?
I assume this is a single slit so the minima would be where intensity is 0 so an equation that makes sense is ##dsin\theta=m\lambda##
I checked the solutions though and it said that
"If the slit width d is less than the wavelength, there are no points at the diffraction pattern at which the
intensity is zero." What does it mean that there are no points at the pattern where the intensity is 0? And why does d have to be less than the wavelength?