- #1

Arman777

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## Homework Statement

Derive the formula for the Doppler effect for a receiver traveling at an angle theta away from a planar source

## Homework Equations

## The Attempt at a Solution

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I thought that we can assume that the wavelength has two components ##λ_x## and ##λ_y## where

##λ_x = ct+vtcosθ## and I am not sure about ##λ_y##. Maybe ##λ_y = \sqrt {(ct)^2+ (vtsinθ)^2)}##

I am not sure how to start or approach please help.

Note : I cannot use wave equation.