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Nutka1998 [239]
3 years ago
12

You want to photograph a circular diffraction pattern whose central maximum has a diameter of 1.0 cm . You have a helium-neon la

ser (λ=633nm) and a 0.11-mm-diameter pinhole. Part A How far behind the pinhole should you place the viewing screen? Express your answer to two significant figures and include the appropriate units.
Physics
1 answer:
Nataly [62]3 years ago
6 0

Answer:

71 cm

Explanation:

The formula to apply here is θ = 1.22λ/D,

diameter of central maximum =1.0 cm

wavelength,   λ= 633 nm

Diameter of pinhole = 0.11 mm

where θ = arc length/distance = s/R

s/R = 1.22λ/D

(.005)/R = (1.22)(633 X 10^-9)/(1.1 X 10^-4)

R = .71 m   which is 71 cm

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