Question

Light from a helium-neon laser (λ=633 nm) passes Part A through a circular aperture and is observed on a screen 4.70 m behind the aperture. The width of the central What is the diameter (in mm ) of the hole? maximum is 2.20 cm. You may want to review

Answer 1

The diameter of the hole is 11.9 mm

This is calculated using the formula

d=λ/D where d is the diameter of the hole, λ is the wavelength of light (633nm in this case) and D is the distance between the light source and the screening (in this case 4.7m)