Question

Green light of a certain wavelength is incident upon two valors separated by 2.10 x 10^-5 m. A screen is placed .800m from the slits. The distance from the central bright line to the first-order line is 19.9 mm. What's the wavelength of the light ?

Answer 1

for bright fringe on a young double slit u would use the formula

Y = ( m× wavelength × distance from the screen ) / ( distance btn the slits )

Explanation:

1. since u already have distance btn the slits which is = 2.10....
2. u have Y =19.9 ( u will change it to meters )
3. u have distance from the screen is 800