A two-slit Fraunhofer interference-diffraction pattern is observed with light of

Question

A two-slit Fraunhofer interference-diffraction pattern is observed with light of wavelength 646 nm. The slits have widths of 0.08 mm and are separated by 2.24 mm. How many bright fringes will be seen inside the central diffraction maximum?

Two small speakers are separated by a distance of 5 cm, as shown. The speakers are driven in phase with a sine wave signal of frequency 12kHz. A small microphone is placed a distance 0.5 m away from the speakers on the axis running through the middle of the two speakers, and the microphone is then moved perpendicular to the axis. Where does the microphone record the first minimum of the interference pattern from the speakers as measured from the axis? The speed of sound in air is 343 m/s

a). _______ m (from axis)

And the first maximum

b.)________ m (from axis)

Explanation / Answer

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