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Snell’s law states that the ratio of the sine of the angle of incidence to the sine of the refraction is constant and equals the ratio of the velocity of the wave in the incident medium to the velocity of the refracting medium.
distance between consecutive nodal and antinodal lines
The bandwidth would also decrease if;
distance between the sources is increased.
Criteria for Interference in 2 D Phase relationship Annulment Reinforcement in phase G.P.D. = (2m+1) /2 G.P.D. = m phase reversal of one wave G.P.D. = m G.P.D. = (2m+1) /2 phase reversal of both waves G.P.D. = (2m+1) /2 G.P.D. = m