Question

During replection of sound on a plain surface if sound an angle of 47°with normal then angle replection of sound will be
(a) 46°
(b) 47°
(c) 94°
(d) 74°





Q. 2.In pasturization process milk is heated up to in ___temperature.

Answer 1

1) (b) 47° because angle of reflection is equal to angle of incidence