Question

Monochromatic light falling on two slits 0.045 mm apart produces the third-order fringe at a 7.2° angle. What is the wavelength of the light used?

Answer 1

what did you try?

Answer 2

\[d \sin \theta = m \lambda\]

Answer 3

I have no idea how to do it! :/ my teacher gave us no guidance

Answer 4

m is the order of the max

Answer 5

you must have been given the equation...

Answer 6

o_o still confused

Answer 7

can i get a formula please!

Answer 8

d is the distance between the slits, lambda is the wavelength

Answer 9

I need a formula

Answer 10

already gave it

Answer 11

nevermind.