a) Imagine that you are conducting an activity with a laser to create an interference
pattern. Use the
appropriate equations to predict two ways (other than the way
described in the following example) to change the interference pattern in order to
have closer fringes. Explain your predictions.Here's an example to get you started:
According to the equation
Δx = Lλ /d
the distance between the fringes (Δx) is proportional to the wavelength (since
they are both numerators). This means that increasing one will increase the other.
Therefore, decreasing the wavelength will decrease the distance between the fringes.
(Hint: You can use the "Thomas Young's Double-slit Experiment" simulation from
this lesson to verify your predictions.)
b) If you were using a hands-on activity to verify your predictions and use
measurements to determine the wavelength of the laser being used, describe any
safety precautions you would take and sources of error that you might encounter. Be
sure to explain how you might reduce the effects of the sources of error.