Question

In young's double slit experiment ,what is the effect on fringe width,if light of smaller frequency is used and seperation between the slit is increased

Answer 1

lease see the last section of the Wikipedia

rticle on the Young's double slit experiment.

‘ou will find that the (expression for the)

pacing of the fringes (on a screen) at a distance

from the slits is given by

v=zA/d

vhere, d is the distance between the two slits,

nd A is the wavelength of the light.

"he spacing w between adjacent fringes is

lirectly proportional to the wavelength A,

yrovided z and d are constant. A lower

requency implies larger wavelength, so the

ringe spacing will be larger for lower frequency.

Answer 2

Answer:

The light intensity produced by the slits increases with increased width of the slit. The screen thus develops brighter fringes as the slit width increases.