Patterns central maximum
You illuminate a slit of width 0.0575 mm with light of wavelength 715 nm and observe the resulting diffraction pattern on a screen that is situated 2.29 m from the slit. What is the width, in centimeters, of the pattern's central maximum?
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Now you can use your ruler to measure that the central bright circle is 20.2 cm in diameter. What is the diameter of the needle?
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