172942
If a star appearing yellow starts accelerating towards the earth, its colour appears to be turned
1 suddenly red
2 gradually red
3 suddenly blue
4 gradually blue
Explanation:
D As the star coming closer to the earth, the frequency of the light increases and the wavelength decrease due to the Doppler effect. Thus, if a star emitting yellow light and is accelerating towards an observer on earth, it will appear that its colour is gradually changing to blue.
MHT-CET 2020
WAVES
172952
A train is moving towards north. At one place, it turns towards north-east. Here, we observe that
1 the radius of curvature of outer rail will be greater than that of the inner rail
2 the radius of curvature of inner rail will be greater than that of the outer rail
3 the radius of curvature of the outer and inner rails will be the same
4 the radius of curvature of inner rail will be infinite
Explanation:
A A train is moving towards north. At one place it turns towards north- east. We observe that the radius of curvature of outer rail will be greater than that of the inner rail because the velocity of wheel on outer rail is greater than the velocity of wheel on inner rail.
AP EAMCET (23.09.2020) Shift-I
WAVES
173029
Doppler phenomena is related with
1 pitch (Frequency)
2 loudness
3 quality
4 reflection
Explanation:
A Doppler phenomena is related with frequency (Pitch). When the source of sound and the listener are in relative motion to each other the frequency of the sound heard by the listener is not the same as the source frequency. This effect is called the Doppler effect. - Thus sound above 80 decibels $(\mathrm{dB})$ become noise to human ears.
CG PET- 2008
WAVES
173003
The apparent change in frequency of sound due to the relative motion between the observer and the source of sound is called
1 Doppler effect
2 Phenomenon of beats
3 Phenomenon of stationary waves
4 Diffraction of sound waves
5 Interference of sound waves
Explanation:
A Doppler effect refers to the change in wave frequency during the relative motion between a wave source and its observer. It is important in astronomy because it enables the velocity of light emitting objects in space, such as stars or galaxies, to be worked out.
Kerala CEE - 2016
WAVES
173018
Doppler's effect will not be applicable when the velocity of sound source is
1 less than the velocity of sound
2 greater than the velocity of sound
3 zero
4 None of the above
Explanation:
B Doppler's effect will not be applicable when the velocity of sound source is greater than the velocity of sound or the source of sound moves towards the listener with a velocity greater than the velocity of sound.
172942
If a star appearing yellow starts accelerating towards the earth, its colour appears to be turned
1 suddenly red
2 gradually red
3 suddenly blue
4 gradually blue
Explanation:
D As the star coming closer to the earth, the frequency of the light increases and the wavelength decrease due to the Doppler effect. Thus, if a star emitting yellow light and is accelerating towards an observer on earth, it will appear that its colour is gradually changing to blue.
MHT-CET 2020
WAVES
172952
A train is moving towards north. At one place, it turns towards north-east. Here, we observe that
1 the radius of curvature of outer rail will be greater than that of the inner rail
2 the radius of curvature of inner rail will be greater than that of the outer rail
3 the radius of curvature of the outer and inner rails will be the same
4 the radius of curvature of inner rail will be infinite
Explanation:
A A train is moving towards north. At one place it turns towards north- east. We observe that the radius of curvature of outer rail will be greater than that of the inner rail because the velocity of wheel on outer rail is greater than the velocity of wheel on inner rail.
AP EAMCET (23.09.2020) Shift-I
WAVES
173029
Doppler phenomena is related with
1 pitch (Frequency)
2 loudness
3 quality
4 reflection
Explanation:
A Doppler phenomena is related with frequency (Pitch). When the source of sound and the listener are in relative motion to each other the frequency of the sound heard by the listener is not the same as the source frequency. This effect is called the Doppler effect. - Thus sound above 80 decibels $(\mathrm{dB})$ become noise to human ears.
CG PET- 2008
WAVES
173003
The apparent change in frequency of sound due to the relative motion between the observer and the source of sound is called
1 Doppler effect
2 Phenomenon of beats
3 Phenomenon of stationary waves
4 Diffraction of sound waves
5 Interference of sound waves
Explanation:
A Doppler effect refers to the change in wave frequency during the relative motion between a wave source and its observer. It is important in astronomy because it enables the velocity of light emitting objects in space, such as stars or galaxies, to be worked out.
Kerala CEE - 2016
WAVES
173018
Doppler's effect will not be applicable when the velocity of sound source is
1 less than the velocity of sound
2 greater than the velocity of sound
3 zero
4 None of the above
Explanation:
B Doppler's effect will not be applicable when the velocity of sound source is greater than the velocity of sound or the source of sound moves towards the listener with a velocity greater than the velocity of sound.
172942
If a star appearing yellow starts accelerating towards the earth, its colour appears to be turned
1 suddenly red
2 gradually red
3 suddenly blue
4 gradually blue
Explanation:
D As the star coming closer to the earth, the frequency of the light increases and the wavelength decrease due to the Doppler effect. Thus, if a star emitting yellow light and is accelerating towards an observer on earth, it will appear that its colour is gradually changing to blue.
MHT-CET 2020
WAVES
172952
A train is moving towards north. At one place, it turns towards north-east. Here, we observe that
1 the radius of curvature of outer rail will be greater than that of the inner rail
2 the radius of curvature of inner rail will be greater than that of the outer rail
3 the radius of curvature of the outer and inner rails will be the same
4 the radius of curvature of inner rail will be infinite
Explanation:
A A train is moving towards north. At one place it turns towards north- east. We observe that the radius of curvature of outer rail will be greater than that of the inner rail because the velocity of wheel on outer rail is greater than the velocity of wheel on inner rail.
AP EAMCET (23.09.2020) Shift-I
WAVES
173029
Doppler phenomena is related with
1 pitch (Frequency)
2 loudness
3 quality
4 reflection
Explanation:
A Doppler phenomena is related with frequency (Pitch). When the source of sound and the listener are in relative motion to each other the frequency of the sound heard by the listener is not the same as the source frequency. This effect is called the Doppler effect. - Thus sound above 80 decibels $(\mathrm{dB})$ become noise to human ears.
CG PET- 2008
WAVES
173003
The apparent change in frequency of sound due to the relative motion between the observer and the source of sound is called
1 Doppler effect
2 Phenomenon of beats
3 Phenomenon of stationary waves
4 Diffraction of sound waves
5 Interference of sound waves
Explanation:
A Doppler effect refers to the change in wave frequency during the relative motion between a wave source and its observer. It is important in astronomy because it enables the velocity of light emitting objects in space, such as stars or galaxies, to be worked out.
Kerala CEE - 2016
WAVES
173018
Doppler's effect will not be applicable when the velocity of sound source is
1 less than the velocity of sound
2 greater than the velocity of sound
3 zero
4 None of the above
Explanation:
B Doppler's effect will not be applicable when the velocity of sound source is greater than the velocity of sound or the source of sound moves towards the listener with a velocity greater than the velocity of sound.
172942
If a star appearing yellow starts accelerating towards the earth, its colour appears to be turned
1 suddenly red
2 gradually red
3 suddenly blue
4 gradually blue
Explanation:
D As the star coming closer to the earth, the frequency of the light increases and the wavelength decrease due to the Doppler effect. Thus, if a star emitting yellow light and is accelerating towards an observer on earth, it will appear that its colour is gradually changing to blue.
MHT-CET 2020
WAVES
172952
A train is moving towards north. At one place, it turns towards north-east. Here, we observe that
1 the radius of curvature of outer rail will be greater than that of the inner rail
2 the radius of curvature of inner rail will be greater than that of the outer rail
3 the radius of curvature of the outer and inner rails will be the same
4 the radius of curvature of inner rail will be infinite
Explanation:
A A train is moving towards north. At one place it turns towards north- east. We observe that the radius of curvature of outer rail will be greater than that of the inner rail because the velocity of wheel on outer rail is greater than the velocity of wheel on inner rail.
AP EAMCET (23.09.2020) Shift-I
WAVES
173029
Doppler phenomena is related with
1 pitch (Frequency)
2 loudness
3 quality
4 reflection
Explanation:
A Doppler phenomena is related with frequency (Pitch). When the source of sound and the listener are in relative motion to each other the frequency of the sound heard by the listener is not the same as the source frequency. This effect is called the Doppler effect. - Thus sound above 80 decibels $(\mathrm{dB})$ become noise to human ears.
CG PET- 2008
WAVES
173003
The apparent change in frequency of sound due to the relative motion between the observer and the source of sound is called
1 Doppler effect
2 Phenomenon of beats
3 Phenomenon of stationary waves
4 Diffraction of sound waves
5 Interference of sound waves
Explanation:
A Doppler effect refers to the change in wave frequency during the relative motion between a wave source and its observer. It is important in astronomy because it enables the velocity of light emitting objects in space, such as stars or galaxies, to be worked out.
Kerala CEE - 2016
WAVES
173018
Doppler's effect will not be applicable when the velocity of sound source is
1 less than the velocity of sound
2 greater than the velocity of sound
3 zero
4 None of the above
Explanation:
B Doppler's effect will not be applicable when the velocity of sound source is greater than the velocity of sound or the source of sound moves towards the listener with a velocity greater than the velocity of sound.
172942
If a star appearing yellow starts accelerating towards the earth, its colour appears to be turned
1 suddenly red
2 gradually red
3 suddenly blue
4 gradually blue
Explanation:
D As the star coming closer to the earth, the frequency of the light increases and the wavelength decrease due to the Doppler effect. Thus, if a star emitting yellow light and is accelerating towards an observer on earth, it will appear that its colour is gradually changing to blue.
MHT-CET 2020
WAVES
172952
A train is moving towards north. At one place, it turns towards north-east. Here, we observe that
1 the radius of curvature of outer rail will be greater than that of the inner rail
2 the radius of curvature of inner rail will be greater than that of the outer rail
3 the radius of curvature of the outer and inner rails will be the same
4 the radius of curvature of inner rail will be infinite
Explanation:
A A train is moving towards north. At one place it turns towards north- east. We observe that the radius of curvature of outer rail will be greater than that of the inner rail because the velocity of wheel on outer rail is greater than the velocity of wheel on inner rail.
AP EAMCET (23.09.2020) Shift-I
WAVES
173029
Doppler phenomena is related with
1 pitch (Frequency)
2 loudness
3 quality
4 reflection
Explanation:
A Doppler phenomena is related with frequency (Pitch). When the source of sound and the listener are in relative motion to each other the frequency of the sound heard by the listener is not the same as the source frequency. This effect is called the Doppler effect. - Thus sound above 80 decibels $(\mathrm{dB})$ become noise to human ears.
CG PET- 2008
WAVES
173003
The apparent change in frequency of sound due to the relative motion between the observer and the source of sound is called
1 Doppler effect
2 Phenomenon of beats
3 Phenomenon of stationary waves
4 Diffraction of sound waves
5 Interference of sound waves
Explanation:
A Doppler effect refers to the change in wave frequency during the relative motion between a wave source and its observer. It is important in astronomy because it enables the velocity of light emitting objects in space, such as stars or galaxies, to be worked out.
Kerala CEE - 2016
WAVES
173018
Doppler's effect will not be applicable when the velocity of sound source is
1 less than the velocity of sound
2 greater than the velocity of sound
3 zero
4 None of the above
Explanation:
B Doppler's effect will not be applicable when the velocity of sound source is greater than the velocity of sound or the source of sound moves towards the listener with a velocity greater than the velocity of sound.
