Solution:-
Wave from equation
ψ=Aei2πυ(t−cr) =Aei2πυ(t−c(xcosθ+ysinθ))
Similarly S' co-ordinate system
ψ′=A′ei2πυ′(t′−cr′) =A′ei2πυ′(t′−c(x′cosθ′+y′sinθ′))
Number of frames does not depend motion of frame
υ(t−cr)=υ′(t′−cr′)
υ(t−cxcosθ+ysinθ)=υ′(t′−cx′cosθ′+y′sinθ′)
x,y,t value put
υ(γ(t′+cβx′)−cγ(x′+βct′)cosθ+y′sinθ)=υ′(t′−cx′cosθ′+y′sinθ′) Comparison x' components
γv(cosθ−β)=υ′cosθ′
Comperision of y' cofficient
vsinθ=v′sinθ′
Comperision of t' components
γv(1−βcosθ)=υ′
υ=γ(1−βcosθ)υ′
equation (1)and(2)
tanθ′=γ(cosθ−β)sinθ
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