Question

explain it in detail ​

Answer 1

Answer:

(1) 6000 A°

Explanation:

distance of minimum from centre ,

y=nλD/w             where, w=width of slit

                                        D=distance between slit and screen

                                        n=1,2,3..

given w=0.2 mm

          D=50 cm

and     separation between first and third minimum to be 3 mm

then,

3 mm= 3λD/w - λD/w

(3 x $10^{-3}$ x  0.2 x $10^{-3}$)/50 x $10^{-2}$ = 2λ  

∴ λ=6000 A°