Physics
posted by Angel on .
A doubleslit interference experiment is performed with light from a laser. The separation between the slits is 0.58 mm, and the
ﬁrstorder maximum of the interference pattern is at an angle of 0.060
◦
from the center of
the pattern.
What is the wavelength of the laser light?
Answer in units of nm

The coordinate of the maximum is
x(max) = k•λ•L/d,
for the first max k=1
x(max1) = λ•L/d,
tanα = x(max1)/L = λ/d.
λ = d• tanα = 0.55•10^3•1.047•10^3 = 5.76•10^7 = 576 nm 
Excuse me what was the equation you used? Because the answer is wrong.

And where did you get those numbers?

I've taken 0.55 mm instead of 0.58 mm
If d = 0.55•10^3, and tan α =1.047•10^3,
λ = d• tanα = 0.58•10^3•1.047•10^3 = 6.07•10^7 = 607 nm.