Question

In: Physics

47. a) Imagine that you are conducting an activity with a laser to create an interference ...

47. 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 (∆x) 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.


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