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Q3) A 1º small angle between two plane mirrors. A source slit is parallel to the
intersection between the mirrors and 70 cm away. The screen is 180 cm from the same
intersection, measured along the normal to the screen. When illuminated with the light,
fringes appear on the screen with a spacing of iqual 0.06 mm, the wavelength λ is [nm]?
a.586
d. 879
b.684
c. 782
e. 978

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