2 marksProperties of Waves
CAPE Physics Unit 1 · 2014 · Paper 2 · Question 5(b)(ii)
A laser beam is incident on two narrow slits separated by a distance, a. The slits are at a distance, D, from a screen.
With a pair of slits, spacing 0.20 mm, at a distance of 0.50 m from the screen, the bright fringes are 1.4 mm apart. What is the wavelength, in nm, of the light produced by the laser?
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