Question

Two lasers are shining on a double slit, with slit separation ddd. Laser 1 has a wavelength of d/20d/20, whereas laser 2 has a wavelength of d/15d/15. The lasers produce separate interference patterns on a screen a distance 5.80 mm away from the slits.

1.

Which laser has its first maximum closer to the central maximum?

laser 1

laser 2

2.

What is the distance Δymax−maxΔymax−maxDeltay_max-max between the first maxima (on the same side of the central maximum) of the two patterns?

Express your answer in meters.

3.

What is the distance Δymax−minΔymax−minDeltay_max-min between the second maximum of laser 1 and the third minimum of laser 2, on the same side of the central maximum?

Express your answer in meters.

Answer 1