In a double slit experiment using light of wavelength 600nm and the angular width ofthe fringe formed on a distant screen is 0.1°. Find the spacing between the two slits
Question
In a double slit experiment using light of wavelength 600nm and the angular width ofthe fringe formed on a distant screen is 0.1°. Find the spacing between the two slits
Solution
Sure, to solve this problem, we need to use the formula for the angular width of a fringe in a double slit experiment, which is given by:
θ = λ / d
where: θ is the angular width of the fringe, λ is the wavelength of the light, and d is the spacing between the two slits.
We are given that θ = 0.1° and λ = 600 nm = 600 x 10^-9 m. We need to find d.
First, we need to convert the angular width from degrees to radians, because the formula uses radians. There are π radians in 180°, so:
θ = 0.1° x π / 180 = 0.00174533 radians
Now we can rearrange the formula to solve for d:
d = λ / θ
Substituting the given values:
d = (600 x 10^-9 m) / 0.00174533 rad = 3.437 x 10^-4 m = 0.3437 mm
So, the spacing between the two slits is approximately 0.3437 mm.
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