A double slits separated by 0.0580 mm is located at a distance of 1.50 m from a screen. (a) If yellow light of wavelength 588 nm strikes the double slit, what is the separation between the first-order and third-order dark fringes on the screen

The separation between third order and first order is 0.0304 m

Explanation:

Given:

Separation between two slit m

Distance between slit and screen m

Wavelength of light m

From the formula of interference of light,

Here

Where separation between fringes

Here we have to find between third order and first order,

Where = 3   = 1

    m

Therefore, the separation between third order and first order is 0.0304 m

1/0.14nm = 10^10/1.4 a lot