In Young's double slit experiment the separation
d between the slits is 2 mm, the wavelength of the light used is 5896 and distance D between the screen and slits is 100 cm. It is found that the angular width of the fringes is 0.20°. To increase the fringe angular width to 0.21° (with same and D) the separation between the slits needs to be changed to
2.1 mm
1.9 mm
1.8 mm
1.7 mm
As we have learned
Young Double Slit Experiment -
- wherein
Distance of a point on screen from central maxima
Path difference at that point
For nth maxima
Option 1)
2.1 mm
Option 2)
1.9 mm
Option 3)
1.8 mm
Option 4)
1.7 mm