Question

in young's double slit experiment , the two , slits are 0.03 cm apart and the screen is placed at a distance of 1.5m away from the silts , the distance between the central bright fringes and central bright fringes is 1 cm . calculate the wavelength of light used

Answer 1

Answer:

wavelength of light used = 0.0555 cm

Step-by-step explanation:

Assuming 1 cm as the distance between central bright and fourth bright fringe.

distance between the slits d= 0.03 cm

distance between the slits and the screen D= 1.5 m

the distance between the central bright fringes and the fourth central bright fringes is 1 cm.

or,

$\frac{4D\lambda}{d} = 1$

keeping all distances in cm

$\frac{4\times150\lambda}{0.03} = 1$

calculating the above equation we get

λ = 0.0555 cm