A spacer is cut from a playing card of thickness 2.88 × 10-4 m and used to separate one end of two rectangular, optically flat, 3.30 cm long glass plates with n = 1.60, as in the figure below. Laser light at 543 nm shines straight down on the top plate. HINT Adjacent dark bands occur when the air gap thickness changes by half a wavelength. (a) Count the number of phase reversals for the interfering waves. 1061 Click the hint button again to remove this hint. (b) Calculate the separation (in m) between dark interference bands observed on the top plate. 3.11 Xm Need Help? Read It
A spacer is cut from a playing card of thickness 2.88 × 10-4 m and used to separate one end of two rectangular, optically flat, 3.30 cm long glass plates with n = 1.60, as in the figure below. Laser light at 543 nm shines straight down on the top plate. HINT Adjacent dark bands occur when the air gap thickness changes by half a wavelength. (a) Count the number of phase reversals for the interfering waves. 1061 Click the hint button again to remove this hint. (b) Calculate the separation (in m) between dark interference bands observed on the top plate. 3.11 Xm Need Help? Read It
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Transcribed Image Text:A spacer is cut from a playing card of thickness 2.88 × 10−4 m and used to separate one end of two rectangular, optically flat, 3.30 cm long
glass plates with n = 1.60, as in the figure below. Laser light at 543 nm shines straight down on the top plate.
HINT
Adjacent dark bands occur when the air gap thickness changes by half a wavelength.
Click the hint button again to remove this hint.
(a) Count the number of phase reversals for the interfering waves.
1061
X
Need Help?
Ⓡ
(b) Calculate the separation (in m) between dark interference bands observed on the top plate.
3.11
Xm
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