Education
1.When source is moving towards stationary observer:-
In this condition,there is change in frequency of waves or observer perceives less number of waves than original waves.Therefore apparent frequency is given by,
f=velocity of wave*original frequency/apparent wavelength
f =velocity of wave*original frequency/(velocity of wave-velocity of source).
2.When source is moving away from stationary observer:-
In this condition,there is change in frequency of waves or observer perceives more number of waves than original waves.Therefore apparent frequency is given by,
f=velocity of wave*original frequency/apparent wavelength
f =velocity of wave*original frequency/(velocity of wave+velocity of source).
3.When observer moves towards stationary source:-
In this condition,there is change in apparent frequency due to relative velocity between wave and observer.Therefore apparent frequency is given by,
f=(velocity of wave+velocity of obs.)original frequency/velocity of wave
4..When observer moves away from stationary source:-
In this condition,there is change in apparent frequency due to relative velocity between wave and observer.Therefore apparent frequency is given by,
f=(velocity of wave-velocity of obs.)original frequency/velocity of wave
When both source and observer are in motion,apparent frequency is affected by both relative velocity and apparent wavelength.In this case,apparent frequency is given by,
f=relative velocity of wave/effective wavelength
- Newton's Formula For Velocity Of Sound
Velocity Of sound in depends on the two factors:- Modulus of elasticityDensity of medium.By dimension method we can derive the formula for velocity of sound in any medium . We get:- where c is velocity...
- Theory Of Special Relativity
Einstein's Theory Of Special Relativity :- Special relativity is a theory of the structure of space time. It was introduced in Einstein's 1905 paper "On the Electrodynamics of Moving Bodies" . Special relativity is based on two postulates...
- Physics Engineering Syllabus By Ioe
Physics Syllabus For Engineering Entrance Examination In Nepal Given by Institute Of Engineering IOE :Unit I. Mechanics:DimensionsEquations of motion, Motion of a projectile. Laws of motion.Addition and subtraction of vectors. Relative velocity. Equilibrium...
- Why The Sound Is Heard More Clear At Night Than At Day Time?
=>Sound is a longitudinal wave which needs material medium to propagate.So it's velocity depends upon the nature of medium.The most prominent reasons for the loudness of sound at night time are as follows:- 1)Moisture in the air =>We know the...
- Entrance Exam Questions Of Class 11 (physics )
Question Option1 Option2 Option3 Option4 Answer Total internal reflection can occur when lights passes from: a denser to rarer medium a rarer to denser medium one medium to another of equal refractive index medium to another of equal absorption...
Education
DOPPLER'S EFFECTS ON SOUND
Doppler's effects
The apparent change in frequency of wave due to the relative motion between source and observer is called Doppler's effect.When source and observer move,there is change in velocity of wave.And when source moves towards observer,there is change in no. of waves of frequency.It causes change in frequency for observer.When source and observer approach each other,there is increase in apparent frequency but if they are moving away,there is decrease in apparent frequency.The main conditions of Doppler's effect is as follows:-1.When source is moving towards stationary observer:-
In this condition,there is change in frequency of waves or observer perceives less number of waves than original waves.Therefore apparent frequency is given by,
f=velocity of wave*original frequency/apparent wavelength
f =velocity of wave*original frequency/(velocity of wave-velocity of source).
2.When source is moving away from stationary observer:-
In this condition,there is change in frequency of waves or observer perceives more number of waves than original waves.Therefore apparent frequency is given by,
f=velocity of wave*original frequency/apparent wavelength
f =velocity of wave*original frequency/(velocity of wave+velocity of source).
3.When observer moves towards stationary source:-
In this condition,there is change in apparent frequency due to relative velocity between wave and observer.Therefore apparent frequency is given by,
f=(velocity of wave+velocity of obs.)original frequency/velocity of wave
4..When observer moves away from stationary source:-
In this condition,there is change in apparent frequency due to relative velocity between wave and observer.Therefore apparent frequency is given by,
f=(velocity of wave-velocity of obs.)original frequency/velocity of wave
When both source and observer are in motion,apparent frequency is affected by both relative velocity and apparent wavelength.In this case,apparent frequency is given by,
f=relative velocity of wave/effective wavelength
- Newton's Formula For Velocity Of Sound
Velocity Of sound in depends on the two factors:- Modulus of elasticityDensity of medium.By dimension method we can derive the formula for velocity of sound in any medium . We get:- where c is velocity...
- Theory Of Special Relativity
Einstein's Theory Of Special Relativity :- Special relativity is a theory of the structure of space time. It was introduced in Einstein's 1905 paper "On the Electrodynamics of Moving Bodies" . Special relativity is based on two postulates...
- Physics Engineering Syllabus By Ioe
Physics Syllabus For Engineering Entrance Examination In Nepal Given by Institute Of Engineering IOE :Unit I. Mechanics:DimensionsEquations of motion, Motion of a projectile. Laws of motion.Addition and subtraction of vectors. Relative velocity. Equilibrium...
- Why The Sound Is Heard More Clear At Night Than At Day Time?
=>Sound is a longitudinal wave which needs material medium to propagate.So it's velocity depends upon the nature of medium.The most prominent reasons for the loudness of sound at night time are as follows:- 1)Moisture in the air =>We know the...
- Entrance Exam Questions Of Class 11 (physics )
Question Option1 Option2 Option3 Option4 Answer Total internal reflection can occur when lights passes from: a denser to rarer medium a rarer to denser medium one medium to another of equal refractive index medium to another of equal absorption...