Double slits experiment, wavelength calculation

  • Thread starter alsaadawi
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  • #1
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Homework Statement



In a double slit experiment with slits 1. 10-5 m apart, light casts the first bright band 3.10-2 m from the center of a screen 0.65 m away what is the wavelength ?

Homework Equations



dsin(theta) = (m +1/2)lambda,

The Attempt at a Solution



I think to solve this problem I need the angle more to apply this formula

dsin(theta) = (m +1/2)lambda,

am I right, or maybe we can solve it without the angle ?

Thanks in advance
 

Answers and Replies

  • #2
350
1
If you know the distance to the screen and the distance to the first fringe from the centre line then you have the angle information
 
  • #3
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If you know the distance to the screen and the distance to the first fringe from the centre line then you have the angle information

Yess sure, thank you.
 

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