AP EAMCET2009PhysicsWaves and Sound
Four light sources produce the following four waves : (i) y₁=a ( t+ ₁ ) (ii) y₂=a 2 t (iii) y₃=d^ ( t+ ₂ ) (iv) y₄=d^ (3 t+ ) Superposition of which two waves give rise to interference?
Options
- A(i) and (ii)
- B(ii) and (iii)
- C(i) and (iii)
- D(iii) and (iv)
Correct answer
C. (i) and (iii)
Step-by-step solution
Interference phenomenon takes place between two waves which have equal frequency and propagate in same direction. Hence, aligned & y₁=a ( t+ ₁ ) & y₃=d^ ( t+ ₂ ) aligned will give rise to interference as the two waves have same frequency .