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PHYS143 (DB125) Physics For Engineers
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Light is incident on a double-slit. The fourth bright band has an angular distance of 7.0° from the central maximum. What is the distance between the slits (in mm)? (Assume the frequency of the light is 5.1 ×1014 Hz.)
Monochromatic light (λ = 672 nm) is incident on a soap bubble ( = 1.40). How thick is the bubble (in nm) if destructive interference occurs in the reflected light?
A narrow slit is
illuminated with sodium yellow light of wavelength 560 nm. If the central
maximum extends to
±20.0°, how wide is the slit?Estimate the distance (in
cm) between the central bright region and the fourth dark fringe on a screen 4.00 m from two double slits 0.500 mm apart illuminated by 530-nm light.
Two slits separated by
0.050 mm are illuminated with blue light (
lambda= 450 nm). How many
bands of bright lines are there between the central maximum and the 10-cm
position? (The distance between the double slits and the screen is 1.5 m.)
A thin sheet of plastic (n = 1.60) is inserted between two panes of glass to reduce infrared ( = 900 nm) losses. What thickness (in nm) is necessary to produce constructive interference in the reflected infrared radiation?