Helium-neon laser light ( = 632.8 nm) is sentthrough a 0.290 mm wide single slit

Question

Helium-neon laser light ( = 632.8 nm) is sentthrough a 0.290 mm wide single slit.What is the width of the central maximum on a screen 2.00 m from the slit?
1 mm
A screen is placed 48.0 cm from asingle slit, which is illuminated with light of wavelength683 nm. If the distance between thefirst and third minima in the diffraction pattern is 3.20 mm, what is the width of the slit?
1 mm
Helium-neon laser light ( = 632.8 nm) is sentthrough a 0.290 mm wide single slit.What is the width of the central maximum on a screen 2.00 m from the slit?
1 mm
A screen is placed 48.0 cm from asingle slit, which is illuminated with light of wavelength683 nm. If the distance between thefirst and third minima in the diffraction pattern is 3.20 mm, what is the width of the slit?
1 mm

Explanation / Answer

= 632.8 nm, w = 0.290mm, L = 2.00 m, find x. x = 2*L/w = 8.73 mm L = 48.0 cm, = 683 nm, x = 3.20 mm, find w. x/2 = L/w w = 2L/x = 0.205 mm

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