A tone generator emits a sound wave of frequency 1000 Hz and wavelength 0.343 m. Let f be the frequency and λ be the wavelength of this sound measured by an observer who is moving away from the tone generator at a fixed speed. Which of the following statements is true?
o f= 1000 Hz and λ < 0.343 m
o f> 1000 Hz and λ > 0.343 m.
o f> 1000 Hz and λ = 0.343 m.
o f> 1000 Hz and λ< 0.343 m.
o f< 1000 Hz and λ> 0.343 m
o f< 1000 Hz and λ< 0.343 m..