Question

When two slits are illuminated with light of wavelength 6000A°.The fringes observed on a screen at a distance of 2m from the slits and the width of each fringe is 0.7 .calculate thr separation between two slits

Answer 1

Answer:

Explanation:

D= 2m

λ= 6000 Å = 6000 x 10⁻¹⁰ =  6 x 10⁻⁷

x= 0.7 cm

now, we need to find d (distance between two slits)

here, we know that

x = λD/d

and by re arranging the formula we get:

d = λD/x

=> d= 6 x 10⁻⁷ x 2 / 0.7 x 10⁻² m ( 1 cm = 10⁻² m)

=> d= 12 x 10⁻⁴ /7 = 1.714 x 10⁻⁴ m = 0.1714 mm

here is your answer