Question

Will we get an interference pattern in
double slit experiment, of we
replace the source, slits by a single
long-Filament bulb? what would
occcurs of we replace the slits s1 and s2
by same bulb ​

Answer 1

Answer:

1.Superposition Principle According to superposition principle at a particular point in the medium, the resultant displacement y produced by a number of waves is the vector sum of the displacements produced by each of the waves (y1, y 2 , y3 ,•••)

i.e. y = y1+y2+y3

2.Coherent Sources of light are the sources which emit light waves of same frequency, same wavelength and have a constant initial phase difference.

3.Coherent source of light can be obtained by deriving two sources from a primary (or initial) source by

(i)division of wavefront

(ii)division of amplitude

4.Two such sources of light, which do not emit light waves with a constant phase difference are called incoherent sources.