You shine light with a wavelength of 400 nm at two small slits (i and ii) and observe an interference pattern on a screen. what is the difference in path lengths between the light that travels from slit i to the first dark fringe of the pattern and the light that travels from slit ii to the same dark fringe?

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction 

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