Two speakers separated by some distance emit sound of the same frequency

PHYSICS · Multi-part · CBSE · Physics · Waves · Waves

Problem

Two speakers separated by some distance emit sound of the same frequency. At some point

P

the intensity due to each speaker separately is

I_0

. The path difference from

P

to one of the speakers is

\frac{1}{2}\lambda

greater than that from

P

to the other speaker. What is the intensity at

P

if (1) the speakers are coherent and in phase; (2) the speakers are incoherent; (3) the speakers are coherent but have a phase difference of

180^\circ