Hi.(adsbygoogle = window.adsbygoogle || []).push({});

I am a bit confused with this question:

A plane wave of 400-nm light is incident on a 25-µ(mu) m slit in a screen, as shown in the figure below. At what incident angle will the first null of the diffraction pattern be on a line perpendicular to the screen? (picture is attached).

Do I use the formula wavelength=(dSinA)/n ? I am a bit unsure what the "first null" refers to and how this should be taken into account into my formula. Is the first null refering to "n"?

Help would be appreciated. Thank you.

**Physics Forums - The Fusion of Science and Community**

# Problem involving slits, diffraction, and incident angle.

Know someone interested in this topic? Share a link to this question via email,
Google+,
Twitter, or
Facebook

Have something to add?

- Similar discussions for: Problem involving slits, diffraction, and incident angle.

Loading...

**Physics Forums - The Fusion of Science and Community**