Test
Doppler Effect
Preguntas del test (5)
1A source of sound approaches a stationary listener. Which ONE of the following will occur?
- AThe amplitude of the observed sound wave will be more than the amplitude of the sound wave emitted by the source.
- BThe wavelength of the observed sound wave will be greater than the wavelength of the sound wave emitted by the source.
- CThe frequency of the observed sound wave will be more than the frequency of the sound wave emitted by the source.
- DThe speed of the observed sound wave will be greater than the speed of the sound wave emitted by the source.
2An observer moves away from a stationary source. The pitch heard by the
observer appears to change because the …- Aloudness of the source appears to increase.
- Bfrequency of the source appears to increase.
- Cfrequency of the source appears to decrease.
- Dwavelength of the source appears to decrease.
3An aircraft controller is standing on the tarmac of the runway of air field. A small plane moves down the runway. The noise of the engine , as heard by the pilot ,has frequency of 1,17 times the frequency that the controller hears.
Which statement best describes the movement of the plane relative to the controller?- AThe plane is moving towards the controller.
- BThe plane is moving away from the controller.
- CThe plane is passing in front of the controller
- DOne cannot determine the movement of the plane relative to the controller.
4An astronomer observes certain spectral lines obtained from light from a bright star. The spectral line of one particular colour is found to have shifted towards the blue end of the visible spectrum.This suggested that the star is …
- AStationary relative to the earth.
- BMoving away from the earth
- CMoving towards the earth.
- DBecoming brighter.
5Which ONE of the following CANNOT be explained using the Doppler effect?
- AEmission of electrons from a metal surface
- B'Flow meters' used in hospitals
- CRed spectral lines from distant stars being shifted
- DObserved frequency of light from moving bodies being higher than expected
Información
- Descripción
- Grade 12 Physical Sciences Test sobre Doppler Effect, creado por RIAZ OMAR el 26/02/2018.
- Autor
- RIAZ OMAR
- Idioma
- English
- Visitas
- 60
- Etiquetas
- Valoración
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