At most, how many bright fringes can be formed on each side of the central bright fringe (not counting the central bright fringe) when light of 625 nm falls on a double slit whose spacing is 1.97 × 10^-6 m? A) 1 B) 2 C) 3 D) 4 E) 5

Question

Quizplus · Accepted Answer

The number of bright fringes on each side of the central bright fringe is given by the equation:$$N = \frac{aW}{\lambda}-1$$where:* N is the number of bright fringes* a is the slit spacing* W is the width of the screen* λ is the wavelength of lightIn this problem, we are given:* a = 1.97 × 10^-6 m* W = 1.00 m* λ = 625 nm = 6.25 × 10^-7 mSubstituting these values into the equation, we get:$$N = \frac{(1.97 	imes 10^{-6} 	ext{ m})(1.00 	ext{ m})}{6.25 	imes 10^{-7} 	ext{ m}}-1 = 3$$Therefore, there are 3 bright fringes on each side of the central bright fringe, for a total of 7 bright fringes.

At Most, How Many Bright Fringes Can Be Formed on Each