Saved Bookmarks
| 1. |
Aparallel beam of monochromatic light of wavelength 4000 Å is incident normally on a single narrow slit of width 0.0008 mm. The light is focused by a a convex lens on a screen placed in focal plane. The first minimum will be formed for the angle of diffraction equal to |
|
Answer» `0^(@)` `d sin THETA= n lambda=1 lambda [ :. N=1]` `sin theta=(lambda)/(d)` `=(5000xx10^(-10))/(0.001xx10^(-3))=0.5` `:. theta=30^(@)` |
|